It won't let me play the sims 4

To help troubleshoot mod/cc problems:

The newest game patch broke several mods and custom content. This can happen as we get updates for the game. Players using mods and cc have to go through their mods folder to find what needs to be deleted or replaced.

Disabling or turning off both mod/cc options isn't enough of a test.

To test this, move your mods folder to the desktop, clear your game cache to help with troubleshooting. Try playing the game again to test. If it loads okay, it may be that some of the mods/cc have become outdated.

How to Delete Cache Files
https://sims4.crinrict.com/en/2014/09/delete-cache-files/

A list of some of the broken/updated mods/cc
http://forums.thesims.com/en_US/discussion/941998/broken-updated-mods-seasons-june-2018-patch#latest

Finding Problem Mods and CC
http://simswiki.info/wiki.php?title=Game_Help:TS4_Finding_Problem_Custom_Content