If the game starts normally, the issue lies somewhere in your old folder. You can safely copy your and Tray (saved households/houses) folders from "The Sims 4 Backup" back into the newly created "The Sims 4" folder. 6. Run the Game as an Administrator (Windows)
By following these troubleshooting steps and tips, players can resolve the "Sims 4 unable to start: there was an error processing the startup configuration script exclusive" error and get back to enjoying the game.
If the error persists without mods and after clearing the cache, your game's core installation files might be corrupted. The EA App has a built-in tool to fix this. If the game starts normally, the issue lies
The core solution to fix the error in The Sims 4 is to remove any modified .sgr files from your ConfigOverride folder or perform a game repair via the EA App . This specific error occurs when the game tries to boot up but reads corrupted, improperly edited, or outdated graphics configuration scripts—most commonly the GraphicsRules.sgr file.
This error has recurred across multiple EA App versions since 2022. EA has acknowledged it in support threads but has not issued a permanent patch. Community consensus is that the EA App is for script-based validation. Users on Steam (which uses Steam DRM + EA App lite) rarely see this error. Run the Game as an Administrator (Windows) By
A complete miscommunication between a new GPU and old engine profiles.
Turn off or add TS4_x64.exe as an allowed app. The core solution to fix the error in
If the error persists, a specific script may be corrupted. Navigate to: [Game install folder]\Data\Simulation\Game\ Look for startup.lua , main.lua , or any .py script. If they are 0 KB or unreadable, again (Step 2). Do not manually edit these files —the repair will replace them.
Reinstalling is a final, nuclear option, but it is effective if your game's installation has become severely corrupted.
The Sims 4 "Unable to start: There was an error processing the startup configuration script" error completely blocks the game from launching. It usually happens after a game update, a new DLC installation, or when custom content corrupts the startup files.
Fix: Sims 4 "Unable to Start: There Was an Error Processing the Startup Configuration Script Exclusive"