Sims 4 Unable To Start There Was An Error Processing The Startup Configuration Script Exclusive May 2026

This specific error message— "Unable to start: There was an error processing the startup configuration script"

• Right-click TS4.exe or TS4_x64.exe (in your game installation folder, e.g., Program Files\Origin Games\The Sims 4\Game\Bin)
• Go to Properties → Compatibility → Check "Run this program as an administrator" → Apply → OK

Find the ConfigOverride Folder: Locate the folder named ConfigOverride. This specific error message— "Unable to start: There

What I liked

1. Open Origin → My Game Library → Right-click The Sims 4 → "Repair Game."

1. Create a new Mods folder.
2. Add back mods in batches of 10.
3. Launch the game after each batch until the error returns.
4. The last batch you added contains the broken mod. Update or delete it.