Sims 4 won't let me play with CC after the new update....why?

Try having to do this with 11,000+ files... lol you have to put them in separate folders to test. Its a system of elimination. Take a folder out, open the game, see if it works or not, if it does -- narrow it down to a specific item/file in that folder. I organize my folders based on the date of which I download them. So anything I download this month I put in a folder named 12-17.

Hope this helps!