I installed QT 6.2.3 on RedHat 8 (used qt-unified-linux-x64-4.3.0-1-online.run installer package  and everything was fine: I was able to open a project in QtCreator, build and debug without any issues. After I disabled clang related plugins, I could not open any file in QtCreator. 

Here is the error message I get in the console window.

Unable to create custom wizard for class qmakeproject.
Custom wizard factory function failed for Z.Snippet from <some path>/QT6.2.3/Tools/QtCreator/share/qtcreator/templates/wizards/codesnippet.

I tried to uninstall QT and install again - didn't help.

Any suggestion?