I think you’ve just pointed me in the direction of a solution…
The comment you’re referring to seems to be this one:
mv Launcher Launcherbak
ln -s bin Launcher
ln -s ./bin/bg3_dx11.exe ./bin/LariLauncher.exe
cp ./Launcherbak/*.dll ./bin
creating a symlink to trick steam into thinking it’s running the launcher when it actually runs the game. BUT … my SSD is formatted as exFAT, which doesn’t support symlinks, so I can’t do this.
So I’m guessing proton is trying to create a symlink at pfx/dosdevices/c when it installs .NET, but fails, which is also probably why everyone else seems to have a breezy time with it. Not sure why my other games haven’t run into this though… maybe they haven’t needed to install anything there?
I will report back after reformatting my entire SSD lol
Reporting back!
Reformatted with btrfs, steam now does this when I open the game (didn’t before):
anddd it works! Can’t believe this whole headache was just exfat all along lol!
Thank you for your help :D