Build errors after reinstalling VS2019

[pijnappel]

I have integrated Jab into my Xamarin Forms project. It worked very well until I had to reinstall VS2019 some days ago.
Since reinstalling I am getting build errors:

CS0246 The type or namespace name 'Jab' could not be found (are you missing a using directive or an assembly reference?)
and
CS0616 'ServiceProvider' is not an attribute class
and more indicating the Jab package contents cannot be resolved.

I also have the preview of VS2022 installed. There it works perfectly. My colleagues machine uses the same setup with VS2019 and the same code. For him the solution builds without an error.

I'm surely missing something. Thankful for any hints.

[pakrym]

Does the same solution build from the command line (dotnet build)?

What's your output of dotnet --info? Is it different from your colleagues?

[pijnappel]

dotnet build shows different errors because Xamarin is not supported by .net 5.
But I compared the output of dotnet --info to my colleagus output. Turns out I had an old-ish version of the .net 6 preview running. I removed all previews and cleaned up, ran another uninstall-cleanup-install of VS2019.

Now the original error is gone and the namespace, as well as the attributes are recognized again. Unfortunately the solution still doesn't build because of the following error:

Error CS8032 An instance of analyzer Jab.ContainerGenerator cannot be created from C:\Users\me\.nuget\packages\jab\0.6.2\analyzers\dotnet\roslyn4.0\Jab.dll : Could not load file or assembly 'Microsoft.CodeAnalysis, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' or one of its dependencies.

[pakrym]

I was able to repo your original issue. It's fixed in 0.6.3 package. Unfortunately, I wasn't able to reproduce the updated issue. Can you try the fix and see if it helps?

[pijnappel]

That did the trick. I just had to update to Jab 0.6.3 and everything compiles and runs perfectly.
From your changes I can grasp what happened. I just wonder what I did differently to cause this.

Thank you very much!