I could've sworn there wasn't an issue for this, but apparently there is: #1278. I have reproduced the fix for this (downloading the depot) and it works. However, this hasn't received an official Valve statement and the issue doesn't look correctly formatted so I'm letting other people close this if needed.
Hello @Hex4dec, 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/1278#issuecomment-2510024481.
Compatibility Report
System Information
I confirm:
From Proton version 5.13:
steam-629.log
Symptoms
Does not launch at all. Some 4.x and 5.x Proton versions take slightly longer to crash, but no window appears.
Reproduction
Launch the game.