Develop Reference

HTTP Request Exception Xamarin Forms

I am sending a large video file (average file size of 50mb) to my server using HttpClient and PostAsync. I am getting an exception (see below for full exception details). I found a article that the maximimum file size that can be handled is 1mb or less is this true? If so, how can I increase the maximum file size?
{System.Net.Http.HttpRequestException: An error occurred while sending the request ---> System.IO.IOException: Error writing request ---> System.Net.Sockets.SocketException: The socket has been shut down
at System.Net.WebConnection.EndWrite (System.Net.HttpWebRequest request, System.Boolean throwOnError, System.IAsyncResult result) [0x000cc] in <2016f34fb49d404d9e9f5c5e62749987>:0
at System.Net.WebConnectionStream.WriteAsyncCB (System.IAsyncResult r) [0x00013] in <2016f34fb49d404d9e9f5c5e62749987>:0
--- End of inner exception stack trace ---
at System.Net.WebConnectionStream.EndWrite (System.IAsyncResult r) [0x000b8] in <2016f34fb49d404d9e9f5c5e62749987>:0
at System.IO.Stream+<>c.b__53_1 (System.IO.Stream stream, System.IAsyncResult asyncResult) [0x00000] in :0
at (wrapper delegate-invoke) System.Func3[System.IO.Stream,System.IAsyncResult,System.Threading.Tasks.VoidTaskResult].invoke_TResult_T1_T2(System.IO.Stream,System.IAsyncResult)
at System.Threading.Tasks.TaskFactory1+FromAsyncTrimPromise1[TResult,TInstance].Complete (TInstance thisRef, System.Func3[T1,T2,TResult] endMethod, System.IAsyncResult asyncResult, System.Boolean requiresSynchronization) [0x00000] in :0
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw () [0x0000c] in :0
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (System.Threading.Tasks.Task task) [0x0003e] in :0
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Threading.Tasks.Task task) [0x00028] in :0
at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd (System.Threading.Tasks.Task task) [0x00008] in :0
at System.Runtime.CompilerServices.ConfiguredTaskAwaitable+ConfiguredTaskAwaiter.GetResult () [0x00000] in :0
at System.Net.Http.HttpClientHandler+d__64.MoveNext () [0x0036e] in :0
--- End of inner exception stack trace ---
at System.Net.Http.HttpClientHandler+d__64.MoveNext () [0x00489] in :0
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw () [0x0000c] in :0
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (System.Threading.Tasks.Task task) [0x0003e] in :0
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Threading.Tasks.Task task) [0x00028] in :0
at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd (System.Threading.Tasks.Task task) [0x00008] in :0
at System.Runtime.CompilerServices.ConfiguredTaskAwaitable1+ConfiguredTaskAwaiter[TResult].GetResult () [0x00000] in <df077aeeed724748974ac70c763795f3>:0
at System.Net.Http.HttpClient+<SendAsyncWorker>d__49.MoveNext () [0x000ca] in <e4f3fb4cf2054f718c1099b587ec6f1e>:0
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw () [0x0000c] in <df077aeeed724748974ac70c763795f3>:0
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (System.Threading.Tasks.Task task) [0x0003e] in <df077aeeed724748974ac70c763795f3>:0
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Threading.Tasks.Task task) [0x00028] in <df077aeeed724748974ac70c763795f3>:0
at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd (System.Threading.Tasks.Task task) [0x00008] in <df077aeeed724748974ac70c763795f3>:0
at System.Runtime.CompilerServices.TaskAwaiter1[TResult].GetResult () [0x00000] in :0
at TBSMobile.View.MainMenu+d__22.MoveNext () [0x00b96] in C:\Users\lawre\source\repos\TBSMobile\TBSMobile\TBSMobile\View\MainMenu.xaml.cs:1088 }
byte[] crVideoData;
if (!string.IsNullOrEmpty(crvideo))
{
crVideoData = File.ReadAllBytes(crvideo);
}
else
{
crVideoData = null;
}
try
{
if (!string.IsNullOrEmpty(crvideo))
{
var vidlink = "http://" + ipaddress + Constants.requestUrl + "Host=" + host + "&Database=" + database + "&Contact=" + contact + "&Request=Lqr9fy";
string vidcontentType = "application/json";
JObject vidjson = new JObject
{
{ "CAFNo", crcafNo },
{ "CAFDate", crcafDate },
{ "Video", crVideoData }
};
HttpClient vidclient = new HttpClient();
var vidresponse = await vidclient.PostAsync(vidlink, new StringContent(vidjson.ToString(), Encoding.UTF8, vidcontentType));
if (vidresponse.IsSuccessStatusCode)
{
await conn.QueryAsync<CAFTable>("UPDATE tblCaf SET LastSync = ? WHERE CAFNo = ?", DateTime.Parse(current_datetime), crcafNo);
}
}
else
{
await conn.QueryAsync<CAFTable>("UPDATE tblCaf SET LastSync = ? WHERE CAFNo = ?", DateTime.Parse(current_datetime), crcafNo);
}
}
catch(Exception ex)
{
Crashes.TrackError(ex);
}

If your are saving the uploaded video in server using api, May be your max request length smaller than your uploded video size. If you want to upload high size video, Then increase the max request length in your webconfig file. Here is the sample code for increasing max request lenght in web api project.
<httpRuntime targetFramework="4.5.2" maxRequestLength="15200" />

AWS Cognito signup

I'm trying to follow the example for signing up a user in Cognito using C# from here. I had to add some stuff because AmazonCognitoIdentityProviderClient doesn't have an empty constructor. My app happens to be a Xamarin Forms app, but that shouldn't matter. I tried doing it in a .NETStandard project but kept getting an error saying that the method doesn't exist. So I switched to a PCL and now I'm getting System.IO.InvalidDataException: Cannot determine protocol. I get this error on both Android and iOS.
Here is my code:
public async Task SignupUser(string username, string password, string email)
{
const string UserPoolId = "us-east-1_XXXXXXXXX";
const string ClientId = "6xxxxxxxxxxxxxxxxxxxxxxxxx";
const string ClientSecret = "my-client-secret";
const string CognitoIdentityPoolId = "us-east-1:identity-pool-id-here";
try
{
AmazonCognitoIdentityProviderConfig providerConfig = new AmazonCognitoIdentityProviderConfig()
{
RegionEndpoint = RegionEndpoint.USEast1
};
CognitoAWSCredentials cogCreds = new CognitoAWSCredentials(CognitoIdentityPoolId, RegionEndpoint.USEast1);
IdentityProvider = new AmazonCognitoIdentityProviderClient(cogCreds, RegionEndpoint.USEast1);
SignUpRequest signUpRequest = new SignUpRequest()
{
ClientId = ClientId,
Password = password,
Username = username
};
AttributeType emailAttribute = new AttributeType()
{
Name = "email",
Value = email
};
signUpRequest.UserAttributes.Add(emailAttribute);
var signUpResult = await IdentityProvider.SignUpAsync(signUpRequest);
}
catch (Exception ex)
{
Debug.WriteLine(ex);
}
}
Here is the exception:
System.IO.InvalidDataException: Cannot determine protocol
at Amazon.Runtime.Internal.Signer.SignRequest (Amazon.Runtime.IRequestContext requestContext) [0x0007a] in <e08989525980425e9b2f389f7417830e>:0
at Amazon.Runtime.Internal.Signer.PreInvoke (Amazon.Runtime.IExecutionContext executionContext) [0x00013] in <e08989525980425e9b2f389f7417830e>:0
at Amazon.Runtime.Internal.Signer.InvokeAsync[T] (Amazon.Runtime.IExecutionContext executionContext) [0x00000] in <e08989525980425e9b2f389f7417830e>:0
at Amazon.Runtime.Internal.PipelineHandler.InvokeAsync[T] (Amazon.Runtime.IExecutionContext executionContext) [0x0000e] in <e08989525980425e9b2f389f7417830e>:0
at Amazon.Runtime.Internal.CredentialsRetriever.<>n__0[T] (Amazon.Runtime.IExecutionContext executionContext) [0x00000] in <e08989525980425e9b2f389f7417830e>:0
at Amazon.Runtime.Internal.CredentialsRetriever+<InvokeAsync>d__7`1[T].MoveNext () [0x00103] in <e08989525980425e9b2f389f7417830e>:0
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw () [0x0000c] in /Library/Frameworks/Xamarin.iOS.framework/Versions/11.6.1.4/src/mono/mcs/class/referencesource/mscorlib/system/runtime/exceptionservices/exceptionservicescommon.cs:152
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (System.Threading.Tasks.Task task) [0x00037] in /Library/Frameworks/Xamarin.iOS.framework/Versions/11.6.1.4/src/mono/mcs/class/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:187
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Threading.Tasks.Task task) [0x00028] in /Library/Frameworks/Xamarin.iOS.framework/Versions/11.6.1.4/src/mono/mcs/class/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:156
at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd (System.Threading.Tasks.Task task) [0x00008] in /Library/Frameworks/Xamarin.iOS.framework/Versions/11.6.1.4/src/mono/mcs/class/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:128
at System.Runtime.CompilerServices.ConfiguredTaskAwaitable`1+ConfiguredTaskAwaiter[TResult].GetResult () [0x00000] in /Library/Frameworks/Xamarin.iOS.framework/Versions/11.6.1.4/src/mono/mcs/class/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:535
at Amazon.Runtime.Internal.RetryHandler+<InvokeAsync>d__10`1[T].MoveNext () [0x000b0] in <e08989525980425e9b2f389f7417830e>:0
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw () [0x0000c] in /Library/Frameworks/Xamarin.iOS.framework/Versions/11.6.1.4/src/mono/mcs/class/referencesource/mscorlib/system/runtime/exceptionservices/exceptionservicescommon.cs:152
at Amazon.Runtime.Internal.RetryHandler+<InvokeAsync>d__10`1[T].MoveNext () [0x001b0] in <e08989525980425e9b2f389f7417830e>:0
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw () [0x0000c] in /Library/Frameworks/Xamarin.iOS.framework/Versions/11.6.1.4/src/mono/mcs/class/referencesource/mscorlib/system/runtime/exceptionservices/exceptionservicescommon.cs:152
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (System.Threading.Tasks.Task task) [0x00037] in /Library/Frameworks/Xamarin.iOS.framework/Versions/11.6.1.4/src/mono/mcs/class/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:187
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Threading.Tasks.Task task) [0x00028] in /Library/Frameworks/Xamarin.iOS.framework/Versions/11.6.1.4/src/mono/mcs/class/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:156
at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd (System.Threading.Tasks.Task task) [0x00008] in /Library/Frameworks/Xamarin.iOS.framework/Versions/11.6.1.4/src/mono/mcs/class/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:128
at System.Runtime.CompilerServices.ConfiguredTaskAwaitable`1+ConfiguredTaskAwaiter[TResult].GetResult () [0x00000] in /Library/Frameworks/Xamarin.iOS.framework/Versions/11.6.1.4/src/mono/mcs/class/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:535
at Amazon.Runtime.Internal.CallbackHandler+<InvokeAsync>d__9`1[T].MoveNext () [0x00080] in <e08989525980425e9b2f389f7417830e>:0
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw () [0x0000c] in /Library/Frameworks/Xamarin.iOS.framework/Versions/11.6.1.4/src/mono/mcs/class/referencesource/mscorlib/system/runtime/exceptionservices/exceptionservicescommon.cs:152
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (System.Threading.Tasks.Task task) [0x00037] in /Library/Frameworks/Xamarin.iOS.framework/Versions/11.6.1.4/src/mono/mcs/class/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:187
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Threading.Tasks.Task task) [0x00028] in /Library/Frameworks/Xamarin.iOS.framework/Versions/11.6.1.4/src/mono/mcs/class/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:156
at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd (System.Threading.Tasks.Task task) [0x00008] in /Library/Frameworks/Xamarin.iOS.framework/Versions/11.6.1.4/src/mono/mcs/class/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:128
at System.Runtime.CompilerServices.ConfiguredTaskAwaitable`1+ConfiguredTaskAwaiter[TResult].GetResult () [0x00000] in /Library/Frameworks/Xamarin.iOS.framework/Versions/11.6.1.4/src/mono/mcs/class/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:535
at Amazon.Runtime.Internal.CallbackHandler+<InvokeAsync>d__9`1[T].MoveNext () [0x00080] in <e08989525980425e9b2f389f7417830e>:0
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw () [0x0000c] in /Library/Frameworks/Xamarin.iOS.framework/Versions/11.6.1.4/src/mono/mcs/class/referencesource/mscorlib/system/runtime/exceptionservices/exceptionservicescommon.cs:152
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (System.Threading.Tasks.Task task) [0x00037] in /Library/Frameworks/Xamarin.iOS.framework/Versions/11.6.1.4/src/mono/mcs/class/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:187
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Threading.Tasks.Task task) [0x00028] in /Library/Frameworks/Xamarin.iOS.framework/Versions/11.6.1.4/src/mono/mcs/class/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:156
at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd (System.Threading.Tasks.Task task) [0x00008] in /Library/Frameworks/Xamarin.iOS.framework/Versions/11.6.1.4/src/mono/mcs/class/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:128
at System.Runtime.CompilerServices.ConfiguredTaskAwaitable`1+ConfiguredTaskAwaiter[TResult].GetResult () [0x00000] in /Library/Frameworks/Xamarin.iOS.framework/Versions/11.6.1.4/src/mono/mcs/class/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:535
at Amazon.Runtime.Internal.ErrorCallbackHandler+<InvokeAsync>d__5`1[T].MoveNext () [0x00099] in <e08989525980425e9b2f389f7417830e>:0
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw () [0x0000c] in /Library/Frameworks/Xamarin.iOS.framework/Versions/11.6.1.4/src/mono/mcs/class/referencesource/mscorlib/system/runtime/exceptionservices/exceptionservicescommon.cs:152
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (System.Threading.Tasks.Task task) [0x00037] in /Library/Frameworks/Xamarin.iOS.framework/Versions/11.6.1.4/src/mono/mcs/class/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:187
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Threading.Tasks.Task task) [0x00028] in /Library/Frameworks/Xamarin.iOS.framework/Versions/11.6.1.4/src/mono/mcs/class/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:156
at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd (System.Threading.Tasks.Task task) [0x00008] in /Library/Frameworks/Xamarin.iOS.framework/Versions/11.6.1.4/src/mono/mcs/class/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:128
at System.Runtime.CompilerServices.ConfiguredTaskAwaitable`1+ConfiguredTaskAwaiter[TResult].GetResult () [0x00000] in /Library/Frameworks/Xamarin.iOS.framework/Versions/11.6.1.4/src/mono/mcs/class/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:535
at Amazon.Runtime.Internal.MetricsHandler+<InvokeAsync>d__1`1[T].MoveNext () [0x000ab] in <e08989525980425e9b2f389f7417830e>:0
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw () [0x0000c] in /Library/Frameworks/Xamarin.iOS.framework/Versions/11.6.1.4/src/mono/mcs/class/referencesource/mscorlib/system/runtime/exceptionservices/exceptionservicescommon.cs:152
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (System.Threading.Tasks.Task task) [0x00037] in /Library/Frameworks/Xamarin.iOS.framework/Versions/11.6.1.4/src/mono/mcs/class/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:187
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Threading.Tasks.Task task) [0x00028] in /Library/Frameworks/Xamarin.iOS.framework/Versions/11.6.1.4/src/mono/mcs/class/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:156
at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd (System.Threading.Tasks.Task task) [0x00008] in /Library/Frameworks/Xamarin.iOS.framework/Versions/11.6.1.4/src/mono/mcs/class/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:128
at System.Runtime.CompilerServices.TaskAwaiter`1[TResult].GetResult () [0x00000] in /Library/Frameworks/Xamarin.iOS.framework/Versions/11.6.1.4/src/mono/mcs/class/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:357

I solved the same issue sending "null" as credentials in AmazonCognitoIdentityProviderClient constructor:
IdentityProvider = new AmazonCognitoIdentityProviderClient(null, RegionEndpoint.USEast1);
I don't know why but it works perfectly after that, no documentation found.

var region = RegionEndpoint.GetBySystemName("us-west-2"); // use the region that you need
IdentityProvider = new AmazonCognitoIdentityProviderClient(null, region);

Azure AD Mobile Authentication using Common Tenant

I'm writing a Xamarin app, and I'd like to give my users the ability to sign in with Azure AD from any tenant. In the world of web apps, you can do that using the common tenant; however, for some reason it seems like that's a problem for mobile apps.
Based on https://azure.microsoft.com/en-gb/documentation/articles/app-service-mobile-dotnet-how-to-use-client-library/#adal, my client code looks like this:
private async Task AadAuthenticateAsync()
{
const string authority = "https://login.microsoftonline.com/common";
const string resourceId = "<My Resource ID>";
const string clientId = "<My Client ID>";
string redirectUri = $"{AppSettings.ServerUri}/.auth/login/done";
try
{
var authContext = new AuthenticationContext(authority);
var authResult = await authContext.AcquireTokenAsync(resourceId, clientId, new Uri(redirectUri), new PlatformParameters(this));
var payload = new JObject { ["access_token"] = authResult.AccessToken };
_user = await _client.LoginAsync(MobileServiceAuthenticationProvider.WindowsAzureActiveDirectory, payload);
}
catch (Exception ex)
{
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.SetMessage(ex.Message);
builder.SetTitle("You must log in. Login Required");
builder.Create().Show();
}
}
However, when I sign in using this flow, the _client.LoginAsync step throws an exception, saying "You do not have permission to view this directory or page".
My web app is already configured to be multi-tenant, so I would have expected this flow to work as expected. Am I missing something, or is there another way to do this, given that it should be a fairly common use case?
UPDATE
When I first set this system up, I used a tenant without any users as my realm. All other tenants, including the tenant containing my own users, will be signing in using the common tenant. Following Saca's suggestion, I set up a user in mytenant.onmicrosoft.com, and signing in as that user works without a hitch: both for the authority login.microsoftonline.com/mytenant.onmicrosoft.com and login.microsoftonline.com/common. However, any user from any other tenant blows up with the same exception. In other words, although I've set the web app up as a multi-tenant app, mobile authentication seems not to accept the multi-tenant use case.
The request URL that gets invoked by _client.LoginAsync() is /.auth/login/aad.
UPDATE 2 At Saca's request, here is the stack trace:
at Microsoft.WindowsAzure.MobileServices.MobileServiceHttpClient+d__18.MoveNext () [0x0022f] in :0
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw () [0x0000c] in /Users/builder/data/lanes/2923/52635947/source/mono/external/referencesource/mscorlib/system/runtime/exceptionservices/exceptionservicescommon.cs:143
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (System.Threading.Tasks.Task task) [0x00047] in /Users/builder/data/lanes/2923/52635947/source/mono/external/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:187
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Threading.Tasks.Task task) [0x0002e] in /Users/builder/data/lanes/2923/52635947/source/mono/external/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:156
at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd (System.Threading.Tasks.Task task) [0x0000b] in /Users/builder/data/lanes/2923/52635947/source/mono/external/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:128
at System.Runtime.CompilerServices.TaskAwaiter.GetResult () [0x00000] in /Users/builder/data/lanes/2923/52635947/source/mono/external/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:113
at Microsoft.WindowsAzure.MobileServices.MobileServiceHttpClient+d__1d.MoveNext () [0x0010d] in :0
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw () [0x0000c] in /Users/builder/data/lanes/2923/52635947/source/mono/external/referencesource/mscorlib/system/runtime/exceptionservices/exceptionservicescommon.cs:143
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (System.Threading.Tasks.Task task) [0x00047] in /Users/builder/data/lanes/2923/52635947/source/mono/external/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:187
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Threading.Tasks.Task task) [0x0002e] in /Users/builder/data/lanes/2923/52635947/source/mono/external/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:156
at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd (System.Threading.Tasks.Task task) [0x0000b] in /Users/builder/data/lanes/2923/52635947/source/mono/external/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:128
at System.Runtime.CompilerServices.TaskAwaiter1[TResult].GetResult () [0x00000] in /Users/builder/data/lanes/2923/52635947/source/mono/external/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:357
at Microsoft.WindowsAzure.MobileServices.MobileServiceHttpClient+d__4.MoveNext () [0x00118] in :0
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw () [0x0000c] in /Users/builder/data/lanes/2923/52635947/source/mono/external/referencesource/mscorlib/system/runtime/exceptionservices/exceptionservicescommon.cs:143
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (System.Threading.Tasks.Task task) [0x00047] in /Users/builder/data/lanes/2923/52635947/source/mono/external/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:187
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Threading.Tasks.Task task) [0x0002e] in /Users/builder/data/lanes/2923/52635947/source/mono/external/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:156
at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd (System.Threading.Tasks.Task task) [0x0000b] in /Users/builder/data/lanes/2923/52635947/source/mono/external/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:128
at System.Runtime.CompilerServices.TaskAwaiter1[TResult].GetResult () [0x00000] in /Users/builder/data/lanes/2923/52635947/source/mono/external/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:357
at Microsoft.WindowsAzure.MobileServices.MobileServiceHttpClient+d__0.MoveNext () [0x0008d] in :0
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw () [0x0000c] in /Users/builder/data/lanes/2923/52635947/source/mono/external/referencesource/mscorlib/system/runtime/exceptionservices/exceptionservicescommon.cs:143
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (System.Threading.Tasks.Task task) [0x00047] in /Users/builder/data/lanes/2923/52635947/source/mono/external/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:187
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Threading.Tasks.Task task) [0x0002e] in /Users/builder/data/lanes/2923/52635947/source/mono/external/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:156
at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd (System.Threading.Tasks.Task task) [0x0000b] in /Users/builder/data/lanes/2923/52635947/source/mono/external/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:128
at System.Runtime.CompilerServices.TaskAwaiter1[TResult].GetResult () [0x00000] in /Users/builder/data/lanes/2923/52635947/source/mono/external/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:357
at Microsoft.WindowsAzure.MobileServices.MobileServiceAuthentication+d__0.MoveNext () [0x0006d] in :0
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw () [0x0000c] in /Users/builder/data/lanes/2923/52635947/source/mono/external/referencesource/mscorlib/system/runtime/exceptionservices/exceptionservicescommon.cs:143
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (System.Threading.Tasks.Task task) [0x00047] in /Users/builder/data/lanes/2923/52635947/source/mono/external/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:187
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Threading.Tasks.Task task) [0x0002e] in /Users/builder/data/lanes/2923/52635947/source/mono/external/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:156
at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd (System.Threading.Tasks.Task task) [0x0000b] in /Users/builder/data/lanes/2923/52635947/source/mono/external/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:128
at System.Runtime.CompilerServices.TaskAwaiter1[TResult].GetResult () [0x00000] in /Users/builder/data/lanes/2923/52635947/source/mono/external/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:357
at Oceanus.Droid.MainActivity+d__9.MoveNext () [0x001cd] in C:\Users\Rob Lyndon\Documents\GitHub\Oceanus\Oceanus\Oceanus.Droid\MainActivity.cs:103

WCF service await error?

trying to troubleshoot my wcf connection when it is throwing this error,
im not really sure what it is telling me as i have never worked with this kind of stuff before
ERROR System error.
at (wrapper managed-to-native) System.Object:__icall_wrapper_mono_delegate_end_invoke (object,intptr)
ERROR System error.
at (wrapper managed-to-native) System.Object:__icall_wrapper_mono_delegate_end_invoke (object,intptr)
05-31 13:16:42.025 I/mono-stdout( 5037): at (wrapper delegate-end-invoke) <Module>:end_invoke_object__this___object[]&_IAsyncResult (object[]&,System.IAsyncResult)
at (wrapper delegate-end-invoke) <Module>:end_invoke_object__this___object[]&_IAsyncResult (object[]&,System.IAsyncResult)
05-31 13:16:42.025 I/mono-stdout( 5037): at System.ServiceModel.MonoInternal.ClientRuntimeChannel.EndProcess (System.Reflection.MethodBase method, System.String operationName, System.Object[] parameters, IAsyncResult result) [0x00025] in /Users/builder/data/lanes/2512/d3008455/source/mono/mcs/class/System.ServiceModel/System.ServiceModel/ClientRuntimeChannel.cs:460
at System.ServiceModel.MonoInternal.ClientRuntimeChannel.EndProcess (System.Reflection.MethodBase method, System.String operationName, System.Object[] parameters, IAsyncResult result) [0x00025] in /Users/builder/data/lanes/2512/d3008455/source/mono/mcs/class/System.ServiceModel/System.ServiceModel/ClientRuntimeChannel.cs:460
05-31 13:16:42.025 I/mono-stdout( 5037): at System.ServiceModel.ClientBase`1+ChannelBase`1[TChannel,T].EndInvoke (System.String methodName, System.Object[] args, IAsyncResult result) [0x0003c] in /Users/builder/data/lanes/2512/d3008455/source/mono/mcs/class/System.ServiceModel/System.ServiceModel/ClientBase.cs:404
at System.ServiceModel.ClientBase`1+ChannelBase`1[TChannel,T].EndInvoke (System.String methodName, System.Object[] args, IAsyncResult result) [0x0003c] in /Users/builder/data/lanes/2512/d3008455/source/mono/mcs/class/System.ServiceModel/System.ServiceModel/ClientBase.cs:404
05-31 13:16:42.025 I/mono-stdout( 5037): at CommunityGenerousity.CommunityGenerosiryServiceReference.CommunityGenerosityClient+CommunityGenerosityClientChannel.EndGetActivitys (IAsyncResult result) [0x00008] in \CommunityGenerousity\CommunityGenerousity\CommunityGenerousity\Service References\CommunityGenerosiryServiceReference\Reference.cs:914
at CommunityGenerousity.CommunityGenerosiryServiceReference.CommunityGenerosityClient+CommunityGenerosityClientChannel.EndGetActivitys (IAsyncResult result) [0x00008] in \CommunityGenerousity\CommunityGenerousity\CommunityGenerousity\Service References\CommunityGenerosiryServiceReference\Reference.cs:914
05-31 13:16:42.025 I/mono-stdout( 5037): at CommunityGenerousity.CommunityGenerosiryServiceReference.CommunityGenerosityClient.CommunityGenerousity.CommunityGenerosiryServiceReference.CommunityGenerosity.EndGetActivitys (IAsyncResult result) [0x00001] in \CommunityGenerousity\CommunityGenerousity\CommunityGenerousity\Service References\CommunityGenerosiryServiceReference\Reference.cs:571
at CommunityGenerousity.CommunityGenerosiryServiceReference.CommunityGenerosityClient.CommunityGenerousity.CommunityGenerosiryServiceReference.CommunityGenerosity.EndGetActivitys (IAsyncResult result) [0x00001] in \CommunityGenerousity\CommunityGenerousity\CommunityGenerousity\Service References\CommunityGenerosiryServiceReference\Reference.cs:571
05-31 13:16:42.025 I/mono-stdout( 5037): at System.Threading.Tasks.TaskFactory`1[TResult].FromAsyncCoreLogic (IAsyncResult iar, System.Func`2 endFunction, System.Action`1 endAction, System.Threading.Tasks.Task`1 promise, Boolean requiresSynchronization) [0x00014] in /Users/builder/data/lanes/2512/d3008455/source/mono/external/referencesource/mscorlib/system/threading/Tasks/FutureFactory.cs:552
at System.Threading.Tasks.TaskFactory`1[TResult].FromAsyncCoreLogic (IAsyncResult iar, System.Func`2 endFunction, System.Action`1 endAction, System.Threading.Tasks.Task`1 promise, Boolean requiresSynchronization) [0x00014] in /Users/builder/data/lanes/2512/d3008455/source/mono/external/referencesource/mscorlib/system/threading/Tasks/FutureFactory.cs:552
05-31 13:16:42.025 I/mono-stdout( 5037): --- End of stack trace from previous location where exception was thrown ---
--- End of stack trace from previous location where exception was thrown ---
05-31 13:16:42.025 I/mono-stdout( 5037): at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw () [0x0000c] in /Users/builder/data/lanes/2512/d3008455/source/mono/external/referencesource/mscorlib/system/runtime/exceptionservices/exceptionservicescommon.cs:143
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw () [0x0000c] in /Users/builder/data/lanes/2512/d3008455/source/mono/external/referencesource/mscorlib/system/runtime/exceptionservices/exceptionservicescommon.cs:143
05-31 13:16:42.025 I/mono-stdout( 5037): at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (System.Threading.Tasks.Task task) [0x00047] in /Users/builder/data/lanes/2512/d3008455/source/mono/external/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:201
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (System.Threading.Tasks.Task task) [0x00047] in /Users/builder/data/lanes/2512/d3008455/source/mono/external/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:201
05-31 13:16:42.025 I/mono-stdout( 5037): at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Threading.Tasks.Task task) [0x0002e] in /Users/builder/data/lanes/2512/d3008455/source/mono/external/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:170
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Threading.Tasks.Task task) [0x0002e] in /Users/builder/data/lanes/2512/d3008455/source/mono/external/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:170
05-31 13:16:42.025 I/mono-stdout( 5037): at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd (System.Threading.Tasks.Task task) [0x0000b] in /Users/builder/data/lanes/2512/d3008455/source/mono/external/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:142
at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd (System.Threading.Tasks.Task task) [0x0000b] in /Users/builder/data/lanes/2512/d3008455/source/mono/external/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:142
05-31 13:16:42.025 I/mono-stdout( 5037): at System.Runtime.CompilerServices.TaskAwaiter`1[TResult].GetResult () [0x00000] in /Users/builder/data/lanes/2512/d3008455/source/mono/external/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:372
at System.Runtime.CompilerServices.TaskAwaiter`1[TResult].GetResult () [0x00000] in /Users/builder/data/lanes/2512/d3008455/source/mono/external/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:372
05-31 13:16:42.025 I/mono-stdout( 5037): at CommunityGenerousity.CommunityGenerosiryService+<GetActivitiesAsync>d__10.MoveNext () [0x00079] in CommunityGenerousity\CommunityGenerousity\CommunityGenerousity\CommunityGenerosiryService.cs:138
at CommunityGenerousity.CommunityGenerosiryService+<GetActivitiesAsync>d__10.MoveNext () [0x00079]
this is the code that is throwing the error:
var items= await Task.Factory.FromAsync<ObservableCollection<activityWCF>>(service.BeginGetActivitys, service.EndGetActivitys, null, TaskCreationOptions.None);

The "CollectBundleResources" task failed unexpectedly

I'm newbie to learn xamarin. When i download sample and build but I got error
Severity Code Description Project File Line Suppression State
Error The "CollectBundleResources" task failed unexpectedly.
Xamarin.Messaging.Exceptions.MessagingRemoteException: An error occured on client Build403214 while executing a reply for topic xvs/Build/4.0.3.214/copy-item/SamplyGameiOS/25940bb/CoreData.pak ---> System.IO.DirectoryNotFoundException: Could not find a part of the path "/Users/niennguyen/Library/Caches/Xamarin/mtbs/builds/SamplyGameiOS/25940bb6fa00542affd423f61b9739d0/D:/SamplyGame/packages/UrhoSharp.1.0.410/build/Xamarin.iOS10/../../native"
at System.IO.Directory.CreateDirectoriesInternal (System.String path) <0x19fb700 + 0x00148> in <filename unknown>:0
at System.IO.Directory.CreateDirectory (System.String path) <0x19fb4f0 + 0x000c7> in <filename unknown>:0
at Xamarin.Messaging.Build.Handlers.CopyItemMessageHandler+<>c__DisplayClass1_0.<ExecuteAsync>b__0 () <0x33203b8 + 0x000b7> in <filename unknown>:0
at System.Threading.Tasks.Task.InnerInvoke () <0x1935f30 + 0x00051> in <filename unknown>:0
at System.Threading.Tasks.Task.Execute () <0x1935780 + 0x0004d> in <filename unknown>:0
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw () <0x188f5d0 + 0x00035> in <filename unknown>:0
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (System.Threading.Tasks.Task task) <0x188cf00 + 0x000b7> in <filename unknown>:0
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Threading.Tasks.Task task) <0x188ce60 + 0x00087> in <filename unknown>:0
at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd (System.Threading.Tasks.Task task) <0x188ce10 + 0x0003f> in <filename unknown>:0
at System.Runtime.CompilerServices.ConfiguredTaskAwaitable+ConfiguredTaskAwaiter.GetResult () <0x188d3c0 + 0x0001f> in <filename unknown>:0
at Xamarin.Messaging.Build.Handlers.CopyItemMessageHandler+<ExecuteAsync>d__1.MoveNext () <0x3320000 + 0x00253> in <filename unknown>:0
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw () <0x188f5d0 + 0x00035> in <filename unknown>:0
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (System.Threading.Tasks.Task task) <0x188cf00 + 0x000b7> in <filename unknown>:0
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Threading.Tasks.Task task) <0x188ce60 + 0x00087> in <filename unknown>:0
at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd (System.Threading.Tasks.Task task) <0x188ce10 + 0x0003f> in <filename unknown>:0
at System.Runtime.CompilerServices.TaskAwaiter.GetResult () <0x188cde0 + 0x0001f> in <filename unknown>:0
at Xamarin.Messaging.Client.RequestHandler`1+<HandleAsync>d__5[TMessage].MoveNext () <0x331f780 + 0x0035b> in <filename unknown>:0
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw () <0x188f5d0 + 0x00035> in <filename unknown>:0
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (System.Threading.Tasks.Task task) <0x188cf00 + 0x000b7> in <filename unknown>:0
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Threading.Tasks.Task task) <0x188ce60 + 0x00087> in <filename unknown>:0
at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd (System.Threading.Tasks.Task task) <0x188ce10 + 0x0003f> in <filename unknown>:0
at System.Runtime.CompilerServices.ConfiguredTaskAwaitable+ConfiguredTaskAwaiter.GetResult () <0x188d3c0 + 0x0001f> in <filename unknown>:0
at Xamarin.Messaging.Client.MessageHandlerManager+<>c__DisplayClass17_1`1+<<RegisterHandlerAsync>b__3>d[TMessage].MoveNext () <0x331f110 + 0x00257> in <filename unknown>:0
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw () <0x188f5d0 + 0x00035> in <filename unknown>:0
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (System.Threading.Tasks.Task task) <0x188cf00 + 0x000b7> in <filename unknown>:0
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Threading.Tasks.Task task) <0x188ce60 + 0x00087> in <filename unknown>:0
at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd (System.Threading.Tasks.Task task) <0x188ce10 + 0x0003f> in <filename unknown>:0
at System.Runtime.CompilerServices.TaskAwaiter.GetResult () <0x188cde0 + 0x0001f> in <filename unknown>:0
at Xamarin.Messaging.Client.MessagingClient+<>c__DisplayClass36_0`1+<<ReplyAsync>b__0>d[TRequest].MoveNext () <0x331eba0 + 0x0011b> in <filename unknown>:0
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw () <0x188f5d0 + 0x00035> in <filename unknown>:0
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (System.Threading.Tasks.Task task) <0x188cf00 + 0x000b7> in <filename unknown>:0
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Threading.Tasks.Task task) <0x188ce60 + 0x00087> in <filename unknown>:0
at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd (System.Threading.Tasks.Task task) <0x188ce10 + 0x0003f> in <filename unknown>:0
at System.Runtime.CompilerServices.ConfiguredTaskAwaitable`1+ConfiguredTaskAwaiter[TResult].GetResult () <0x188d600 + 0x00024> in <filename unknown>:0
at Xamarin.Messaging.Client.MessagingClient+<ReplyAsync>d__34`2[TRequest,TResponse].MoveNext () <0x31f70e0 + 0x00383> in <filename unknown>:0
--- End of inner exception stack trace ---
at Xamarin.Messaging.Client.MessagingClient.<PostAsync>d__23`2.MoveNext() in C:\Users\builder\data\lanes\3062\0dd817c0\source\XamarinVS\src\Messaging\Xamarin.Messaging.Client\MessagingClient.cs:line 188
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at Xamarin.Messaging.Client.MessagingClient.<PostAsync>d__22`2.MoveNext() in C:\Users\builder\data\lanes\3062\0dd817c0\source\XamarinVS\src\Messaging\Xamarin.Messaging.Client\MessagingClient.cs:line 0
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at Xamarin.Messaging.Client.MessagingClient.<PostAsync>d__26`2.MoveNext() in C:\Users\builder\data\lanes\3062\0dd817c0\source\XamarinVS\src\Messaging\Xamarin.Messaging.Client\MessagingClient.cs:line 0
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at Xamarin.Messaging.Client.MessagingClient.<PostAsync>d__32`1.MoveNext() in C:\Users\builder\data\lanes\3062\0dd817c0\source\XamarinVS\src\Messaging\Xamarin.Messaging.Client\MessagingClient.cs:line 306
--- End of stack trace from previous location where exception was thrown ---
at Xamarin.Messaging.Client.IMessagingClientExtensions.Execute(Action postAction) in C:\Users\builder\data\lanes\3062\0dd817c0\source\XamarinVS\src\Messaging\Xamarin.Messaging.Client\Extensions\IMessagingClientExtensions.cs:line 231
at Xamarin.Messaging.Client.IMessagingClientExtensions.Post[TRequest](IMessagingClient client, TRequest request, Boolean retain, Int32 timeoutSecs) in C:\Users\builder\data\lanes\3062\0dd817c0\source\XamarinVS\src\Messaging\Xamarin.Messaging.Client\Extensions\IMessagingClientExtensions.cs:line 195
at Xamarin.VisualStudio.Build.BuildClient.UploadItem(String path) in C:\Users\builder\data\lanes\3062\0dd817c0\source\XamarinVS\src\MSBuild\Xamarin.VisualStudio.Build\BuildClient.cs:line 99
at Xamarin.VisualStudio.Build.TaskRunner.CopyRequiredInputFiles(Task task) in C:\Users\builder\data\lanes\3062\0dd817c0\source\XamarinVS\src\MSBuild\Xamarin.VisualStudio.Build\TaskRunner.cs:line 219
at Xamarin.MacDev.Tasks.CollectBundleResources.Execute() in C:\Users\builder\data\lanes\3062\0dd817c0\source\XamarinVS\src\MSBuild\Xamarin.MacDev.Tasks\Tasks\CollectBundleResources.cs:line 14
at Microsoft.Build.BackEnd.TaskExecutionHost.Microsoft.Build.BackEnd.ITaskExecutionHost.Execute()
at Microsoft.Build.BackEnd.TaskBuilder.<ExecuteInstantiatedTask>d__26.MoveNext() SamplyGame.iOS