To give you the best advice for your specific setup, let me know: Do you use (like MCCC or UI Cheats)? Did this happen right after a game update ? Are you on PC or Mac ? Share public link

Some technical users have found success by performing a clean reinstall of drivers using . 6. Temporarily Remove Mods Sims 4 Won't Open or Load - Expert Solutions - JustAnswer

The error is terrifying because it sounds like a deep system failure. In reality, it is almost always a simple traffic jam—a mod, an antivirus, or a stubborn cache file refusing to give the game the "keys" to its own configuration.

The most direct cause of this specific error has been identified by the Sims 4 community. Since the , many players—particularly on Mac—found that the game would no longer launch if a modified or copied version of a file called GraphicsRules.sgr was placed in the ConfigOverride folder.