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C# GODOT | ERROR: call_build: An EditorPlugin build callback failed

Mono: Logfile is: C:\Users\Yunus Aka\AppData\Roaming/Godot/mono/mono_logs/2020_08_12 04.29.52 (13092).txt
Unicode error: invalid skip
ERROR: call_build: An EditorPlugin build callback failed.
At: editor/editor_node.cpp:5273
Hi, i've been start godot and iam taking this error.
I am using mono godot 64 bit and i already download ".NET framework 4.7.1", ".NET framework 4.7" but it doesn't work. Give me same error again.
Please help meee

I solved it for an error at editor/editor_node.cpp:5273 when I looked at the error and the pressed the "view log" there. It said that I was missing .NET developer pack 4.7.
I tried 4.8 first which didn't work. It had to be 4.7.

Waiting for a file to change before restarting dotnet error

I am using asp.net core, razor engine, and entity framework. I am getting this error when I try to run my code in VS code using dotnet watch run. Here is the full error.
Project c-login (.NETCoreApp,Version=v1.0) was previously compiled. Skipping compilation.
A JSON parsing exception occurred in [/Users/aaronmk2/Desktop/CodingDojo/c#/asp.net/entity/c-
login/bin/Debug/netcoreapp1.0/c-login.deps.json]: * Line 1, Column 2 Syntax error: Malformed
token
Error initializing the dependency resolver: An error occurred while parsing /Users/aaronmk2/D
esktop/CodingDojo/c#/asp.net/entity/c-login/bin/Debug/netcoreapp1.0/c-login.deps.json
[DotNetWatcher] fail: dotnet exit code: 139
[DotNetWatcher] info: Waiting for a file to change before restarting dotnet...
Has anyone seen this error before? What is the workaround?

I had the same error, after trying everything I figure out that it was because of the corrupted certificate. For some reason my certificate got corrupted so, I had to delete the old one and generate a new one.
To generate:
dotnet dev-certs https
To trust:
dotnet dev-certs https --trust

I think, you just have to successfully build your project and restart the server. It worked for me.

I received the same error but I had something else wrong. The issue that I had was that I was trying to connect to a server in my appsettings.json file using Microsoft credentials such as using Server=(LocalDB). After updating it to the MacOS way of connecting to a DB, it worked.
I went from
"DefaultConnection": "Server=(localdb)\\MSSQLLocalDB;Database=ShirtDB;Trusted_Connection=True;MultipleActiveResultSets=true"
To
"DefaultConnection": "Server=localhost,*port number*;Database=MyDB;User ID=sa;Password=******"

Although this was already solved I wanted to give another solution since I couldn't find much on this specific error.
I had a similar issue using MySQL that looked like this:
A JSON parsing exception occurred in [C:\foo\bin\Debug\netcoreapp3.1\foo.deps.json]: * Line 1, Column 2 Syntax error: Malformed token
Error initializing the dependency resolver: An error occurred while parsing: C:\foo\bin\Debug\netcoreapp3.1\foo.deps.json
I ended up dropping my schema and removing all my previous migrations and then it started working fine. My best theory is that something I did to my models caused it. Hopefully, this helps someone out.

Mono ThreadPool.QueueUserWorkItem() throws an error

I just got a VPS server running Linux Debian 7 and tried to get one of my C# servers running on it using Mono. Unfortunately it did not work the first time i ran it, it threw this error:
Unhandled Exception: System.TypeLoadException: Could not load type 'System.Runtime.CompilerServices.IAsyncStateMachine' from assembly 'mscorlib, Version=4.0.0.0
I've found out the exact line which is causing this error and it is:
ThreadPool.QueueUserWorkItem( myThread => TcpAccept() );
Without this line the server doesn't accept any connections and so on...
I would like to know how to fix this or find an alternative way to write this line. Any help is greatly appreciated!

NReco.ImageGenerator failed to generate image from file

i'm trying to create jpg files from html using NReco.ImageGenerator nuget.
i'm using function 'GenerateImageFromFile', in most cases the generation works fine, in other cases the dll throws me:
'An unhandled exception of type 'System.Exception' occurred in NReco.ImageGenerator.dll
Additional information: Image generation failed: Exit with code 1 due to network error: ContentNotFoundError'
i'll be glad to hear your opinion, any solution will be appreciated.
Thanks guys.

NReco uses an open source program called "wkhtmltopdf" (you can find it on https://github.com/wkhtmltopdf/wkhtmltopdf).
After run your application the .dll puts the "wkhtmltoimage.exe" in the path, in my case when I run the "wkhtmltoimage.exe" it asks for a .dll, in the majority of the cases you just need install the Visual C++ redistributable package (http://www.microsoft.com/en-us/download/confirmation.aspx?id=40784)

Since ImageGenerator is a .net wrapper for wkhtmltoimage you can apply the following command line option to ignore content load errors:
var htmlToImage = new NReco.ImageGenerator.HtmlToImageConverter();
var htmlToImage.CustomArgs = " --load-error-handling ignore ";
With this option wkhtmltoimage will ignore errors when referenced resource (js,css,images etc) cannot be downloaded.
Ederson's answer about VC++ runtime libs is correct for case if ImageGenerator throws an exception for any input (error message is "The pipe has been ended" or "Image generation failed: (exit code: 255)").

MonoDevelop: Semi cryptic error CS0016

Here's the error I'm getting:
Error CS0016: Could not write to file Fact.Apprentice.Core', cause: Type '<>__AnonType02' was not completed. (CS0016) (Fact.Apprentice.Core - Mono)
If I compile using MonoDevelop + Microsoft .NET, no such error shows up. When using Mono framework, I am unable to compile because of this. Behavior identical for Mac or PC installation.

This kind of error usually indicates compiler bug. The most likely source will be some of your LINQ queries. You could also try Mono 2.11 which should give you better error message.