Hello @msmafra, we're using one issue report per unofficially supported game title, so I've gone ahead and transferred this issue report to https://github.com/ValveSoftware/Proton/issues/556#issuecomment-1429773817.
PROTON_SET_GAME_DRIVE=1x1 2023-02
Compatibility Report
System Information
I confirm:
steam-306130.log.tar.gz
Symptoms
The game runs perfectly (playing since December 2021), just the installation process is problematic, needs PROTON_SET_GAME_DRIVE=1 for it to work and during the process has black screens, pressing Enter repeatedly gives a glance of what is happening. And post-install, the file checking isn't working, it just checks Proton and Soldier.
Reproduction
Install The Elder Scrolls Online, check the installation process and after try to Check Local files.