Opening project files

Whenever I try opening some of my project files (that were created in audacity 2.4.2) in 3.0, I’ll get an error. When I go to open the files that give me an error in 3.0 with the previous version, it opens just fine. The project files are still intact.

How do I fix that issue? I’m on 10.15.7

What is the full and exact error message?
(If it is not in English, please translate it for us and say what language it was in).