Main level file AND AUTOSAVES broken

A level file I’d been working on for a couple months just stopped working without the editor crashing or anything that might corrupt it.
I deleted the asset cache and the level still didn’t show up in the Content Browser. I tried replacing the level file with autosaves and backups, but even they were corrupted.

Is there anything else to try?

Thanks!

Also the backups do appear in the Content Browser but nothing happens when I click on them.

same error on my end, and it’s not the first time for me either… thats why you have to keep multiple backups, because the autosave backups don’t restore the levels either…