Compatibility Report

• Name of the game with compatibility issues: Sims 4
• Steam AppID of the game: 1222670

System Information

• GPU: don't know (Steam Deck 64GB with default Steam OS install)
• Driver/LLVM version: don't know (Steam Deck 64GB with default Steam OS install)
• Kernel version: don't know (Steam Deck 64GB with default Steam OS install)
• Link to full system information report as Gist:
• Proton version: whatever is shipped by Steam as Proton Experimental as of 2023-05-19

I confirm:

• [x] that I haven't found an existing compatibility report for this game. I have actually, but it describes different symptoms, even though also connected to EA App and it no longer launching but it seems to be for existing installs: https://github.com/ValveSoftware/Proton/issues/6396
• [x] that I have checked whether there are updates for my system available.

Symptoms

1. Install the game via a fresh download or delete all local data via verify game cache so it throws away the proton folder
2. Launch, which triggers EA App install process
3. EA App will eventually show a big warning symbol with no text other than a "Send error report" button. After using that button, everything will quit. If you try to launch the game again afterward, it just won't launch and immediately quit.

Reproduction

See symptoms