Same issue with Proton 8.0-1. Log file:
steam-621970.tar.gz
Specs:
I was able to make this game work again. It's another case of bad/corrupted settings uploaded to the cloud that produces the bug discussed above. For someone reason this game is not displaying the Cloud options on the General settings (although it uses it), so you have to manually erase its cloud data using a different approach.
/home/$USER/.steam/steam/userdata/$id/621970)This game seems to be working fine with Proton 9.0-2. I haven't spotted issues so far.
Compatibility Report
System Information
I confirm:
Proton logs
Symptoms
Main menu renders a blank square

Gamepad and keyboard input stop working after first input press
I've also tried to launch it with
PROTON_USE_WINED3D, but the result is the same.Native version has the same symptoms.
This game used to play well before on my end (I was using a Nvidia GPU with Proton 7.0 the last time I tested it). Mesa issue, perhaps ?
Reproduction