can't open project - solved

Hi!
I use audacity 3.02 with Fedora 34 (so it was updated). I can’t open any projects „aup“-projects after update. It really drives me to despair…

Usually I use German language in audacity. After changing to English in audacity, I could open any project again and I could save them in the new format.

Perhaps any other people with the same problem helps this hint.