Grim Dawn error on Pop

I am trying to install Grim Dawn (fitgirl repack), and I keep running into this error. I have tried redownloading the game, but doesn’t help at all. Any suggestions?

Screenshot from 2021-04-07 17-48-37

Any suggestions?

Buy it on Steam. Right now it has a 80% discount, and according to ProtonDB, it works great; it has a Platinum badge, which means it works out of the box.