Here is what I've checked:
No VST is missing, all paths are correct, no windows session, no windows version update, no windows pw, no registry changes...
The only difference is that CW replaces VST instruments by midi tracks, immediately after the product update.
Moremover, troubles had appeared during the same working session, when I've closed, opened and updated CW.
Just like Claude, I cannot use CW anymore.
May be it's not a bug, nor critical, but as a Software Architect, I'm rather dubious with this explanation.