Hello @spaceshipdreams, 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/4003#issuecomment-3069684515.
proton 8.0-5x1 2025-07proton 9.0-4x1 2025-07proton experimentalx1 2025-07proton hotfixx1 2025-07
Compatibility Report
System Information
I confirm:
Symptoms
After selecting any of the versions of Proton listed above and clicking play in Steam, a popup window appears titled "Wine C++ Runtime Library". In the window, it says:
"Assertion failed!
Program: [...game directory information here...]
File: ../src-wine/dlls/winevulkan/loader-thunks.c
Line: 5349
Expression: "!status && "vkGetPipelineCacheData""
Press OK to exit the program, or Cancel to start the Wine debugger."
And/or the game opens and shows a loading screen, but never takes me to the main menu in the game successfully. For some reason the C++ error popup didn't appear anymore after setting the launch options as directed by your error report process, but was appearing previously. In any case, the game appears stuck at some kind of loading screen when it launches the game window and never makes it to the main menu of the game.
I wasn't sure if you wanted the Steam System Information Report and Steam Runtime Diagnostics in the same gist or separate ones so I put them in the same one. The "Steam Runtime Diagnostics" portion begins around line 99 of the gist.
GIST link: https://gist.github.com/spaceshipdreams/e5671fed1a7c77c59fd1e50f0b120487
Gist is also attached.
Reproduction
e5671fed1a7c77c59fd1e50f0b120487-dc9d8e461906ec2107e49daa4ae52d87772d2459.zip