The Sims 4 will not launch, getting error code.

@eva365g  Please restart your computer and try to repair again.

If that doesn't help, please try the suggestions here:

https://sims4.crinrict.com/eng/crin-error/game-already-running/

@fairyofwaves  Please move the Mods folder to the desktop, delete localthumbcache.package, and see whether the game opens.