Thanks to [RUS]siv-siv in the Dinner with an Owl steam community for getting the game to work.
The game seems to work if you set the windows version to windows vista, in winecfg.
I also needed to set directx11 in the launcher (Settings.exe), found in the game root folder.
As the game default OpenGL render would not work.
This fix also seems to work on Dinner with an Owl (1567420), as they both share the same engine PaC-DK.
proton 9.0-2x1 2024-07
Compatibility Report
System Information
I confirm:
steam-2764710.log
Symptoms
The game won't start, it displays an error message.
If you close it, the game shuts down.
Reproduction