Sims 4 won't start

@58x0d82lmqih  Please move the entire Sims 4 folder to the desktop, start the game to create a new folder, enable mods and custom content, and test your mods and cc in the new folder.  This is a bit more thorough than using your old folder.  It can also be more efficient to use the 50/50 method:

https://modthesims.info/wiki.php?title=Game_Help:Finding_Problem_Custom_Content#The_50.25_Method

Keep in mind that you may have a conflict between two or mods or cc items, which could explain why smaller sets of files might work combining them does not.

If you notice any files being restored to the Sims 4 folder, mods or custom content or otherwise, when you haven't put them back manually, the culprit is probably OneDrive, and fixing that is a separate conversation.  Please let me know if this appears to be an issue.