Premiere Pro Beta randomly corrupting projects

I suddenly can no longer open most of my projects. It seems like saving them is actually corrupting the project files, and I get the “An unknown error occurred while opening the project.”
I can retrieve a working copy from the auto-save, which is horrible cause every time I lose some work and need to redo it, but then I can’t open it again after I save it.

This is an urgent issue, please fix, specially that now beta is at 27 so I can no longer revert my projects to Premiere.

System info
    Application: Premiere Pro (Beta) v27.1.0.18
    OS: Windows v10.0.26300, RAM: 255.69 GB GB, CPUs (logical): 20