Yoba decided to put me out of my misery

[Wearlex]

Hey everyone, after six months of intense study, I've decided to return to Stardew Valley. I started the game as usual and then noticed I'd completed the museum (it's a completely new world). I figured it was a problem with the files on my PC, so I decided to reinstall and clean everything. The problem persisted, and I disabled Steam Cloud for Stardew Valley, but that didn't help either. Any ideas on how to fix this? I'd be incredibly grateful, otherwise I'll go crazy with Calculus.

 

[Ereo]

Did you ever use mods?

If not maybe it helps to upload your save file, so the devs can take a look at it.