This startup error appears when The Sims 4 launcher or game attempts to read or execute its startup configuration and fails. The parenthetical "exclusive" strongly suggests the failure occurred while acquiring or validating a file/lock/resource that must be used exclusively (e.g., a lock file, config, or DRM/anti-cheat resource). Causes span corrupted config files, permission or file-lock conflicts, broken game updates, mods/custom content interfering, anti-virus/anti-cheat blocking access, or problems with the Origin/EA Desktop/Steam client.
In addition, players can also try running the game as an administrator. This can help resolve any permission issues that may be preventing the game from accessing necessary files or directories. To run the game as an administrator, players need to right-click on the Sims 4 executable file, select "Run as administrator", and then launch the game. Review: The Sims 4 — "Unable to Start:
Happy Simming!
If you are in the 5% where none of this worked, a full reinstall of The Sims 4 (back up your Saves and Tray folders first!) is your final reset. Remember to delete the The Sims 4 folder entirely from Documents after uninstalling to ensure the fresh install generates pristine configuration scripts. In addition, players can also try running the