Cannot open xaml file anymore, "Catastrophic failure", VS Avalonia previewer crash?

[dbriard]

Hi,
Since today, I cannot open XAML files anymore from Visual Studio, I got a Catastrophic failure 0x8000ffff error. Even with new project.

Anyone know how to make it work again?
If I uninstall Avalonia extension, I can open the xaml, but with no previewer, so I think something get wrong with the previewer.

Is there cache files to clean somewhere? or log files?
Thank you.

[dbriard]

Right click on a XAML file opened a popup saying than avalonia package do not load correctly with more detail in ActivityLog.xml.

SetSite failed for package [AvaloniaPackage]Source: 'AvaloniaVS.VS2022' Description: Could not load file or assembly 'Microsoft.VisualStudio.Threading, Version=17.7.0.0

I'll try to upgrate VS to the latest version

[Takoooooo]

May you please try and install this extension? Does it work correctly for you? Also test the event completions if possible AvaloniaUI/AvaloniaVS#388
AvaloniaVS.VS2022 (2).zip

[dbriard]

Thanks @Takoooooo for your help.
Finally updating Visual Studio fixed the issue :) but I am not really sure what happened.

[timunie]

the "tool" to build the extension was updated, and the update required a newer VS version. A fix for older VS will be there soon.

[Noisyfox]

the "tool" to build the extension was updated, and the update required a newer VS version. A fix for older VS will be there soon.

Still get the same issue on old VS with the latest extension.
Seems that I don't have Microsoft.VisualStudio.Threading, Version=17.4.0.0 on my VS 2022 17.0.32803.143 installation.