Re: Error in The Sims 4 folder

@CharmB789  The issue is most likely something in your Mods folder, so try starting with a(nother) new Sims 4 folder and adding back the files in batches, testing to see what happens.  Any time the game fails to start, you'll know that one of the last files you added is a problem, and you'll need to split the last batch and retest until you find the issue.

Once you've sorted out the Mods folder, you can add back the other folders (saves, Tray, anything else you want to keep) as well.