Hello @F1ReB4LL, err:d3dcompiler:D3DCompile2 <anonymous>:58:1: E5017: Aborting due to not yet implemented feature: Flatten "if" conditionals branches. looks like a line of interest from your Proton log.
Adding D3DCOMPILER_47.dll with Protontricks allows the game to run, though it sometimes crashes while ingame:
d3dcompiler_47.dllx1 2025-11
Compatibility Report
System Information
I confirm:
Symptoms
Crashes when you're trying to start a new game from the main menu with a "Runtime Error!" message.
steam-43500.log
Reproduction
Install and run the game.