What games do you have? Most of my games work great with steams proton. Only some multiplayer games with some anticheat are not supported. I think from my ~260 Games +90% are working Check out protondb.com

Only because Ubisoft does have problems. If their finances would be better they would’nt do it. That’s my opinion. I will never trust this company again.

I do have the same error but i installed bnet via steam. Changing the runner to another proton version (official proton and proton-ge) wont change anything. How to change to a wine-ge version in steam? Or is there another fix? I tried a few of the suggested things from the links but nothing worked :( My OS is Mint 22 Cinnamon I do have proton tricks but no winetricks.

No update available (stable) and rebooted multiple times. Sadly no change :(