Bug? All programs stopped running: B4A, B4i, B4J.

[red30]

An error like this appears:

An error occurred.
Providing a value for "System.Windows.Baml2006.TypeConverterMarkupExtension" threw an exception.
How to fix it?
Note: If you open the Task Manager, B4A.exe is displayed in the processes, but the window itself is not displayed.
Note: Reinstalling B4A does not give any result, the same message ...

 

[DonManfred]

Can you upload a small project showing the issue? How could one help with this less info?

 

[red30]

This message comes up when I start any project and even if I just try to run the B4A.exe shortcut

 

[agraham]

That's a .NET Windows Presentation Foundation error of some sort which is why none of the IDEs work. It looks like your .NET installation is borked

 

[red30]

That's a .NET Windows Presentation Foundation error of some sort which is why none of the IDEs work. It looks like your .NET installation is borked

You were right! I reinstalled the .NET Framework and it worked! Thanks!