Running it using nVidia through PRIME Render Offloading (GeForce GTX 1050 with driver "4.6.0 NVIDIA 440.44") doesn't crash for me. However, the fatal error below persists.
Not sure where to put this since this seems to be a separate problem now. Sorry in advance if this should be somewhere else.
Version 1.54 of the game used to work for Proton 4.11-9 for me (without setting up virtual desktop). Proton 4.11-11 + BR 1.55 (christmas release) now errors with "Fatal Error. Steam must be running to play this game."
Note that this error occured with Proton 4.2-9 + BR 1.54 as well but it worked with 4.11 before.
The ff. line in the above log looks interesting.
48007.167:002f:0030:err:steamclient:create_win_interface Don't recognize interface name: SteamClient020

Looks like Proton 4.11-12 fixed both issues (at least for me).
Thanks for reporting and retesting!
Hi, i have this error, "steam must be running to play this game" since proton 3.7 to 4.2 and the other versions i only have black screen
proton 3.7x1 2021-05proton 4.11-12x1 2020-01proton 4.11-11x1 2019-12proton 4.11-9x1 2019-12proton 4.2-9x1 2019-12
Compatibility Report
System Information
I confirm:
steam-1025600.log
Symptoms
Can't run the game without setting a virtual desktop with winecfg.
Reproduction