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 :(