Unable to open AUP3 files

Hello, I just tried to open an Audacity project that I have been working on and I got the error message “Cannot import AUP3 format. Use File > Open instead” so naturally, I tried to follow the instructions and got the same error. I then tried to open a different project, when I realized that doesn’t work either. I tried every project and learned that none of them would open. I am currently using Audacity 3.1.0 on Windows 10 Pro, though I just updated Audacity before writing this because I realized I was still on 3.0.2, both versions have this problem for me.

Any help is appreciated, and feel free to ask any questions. Thank you!

If you care to, zip up your project and upload it to a file sharing service. Post (or PM me) a link. I’ll take a look at it. Right now I am running out for some errands.