Re: Sims 4 suddenly wont load when mods are involved
Sounds like some mods/CC is outdated/broken.
You can find a full list of broken/incompatible CC and mods since game updated on November 13th over here:
https://forums.thesims.com/en_US/discussion/950909/broken-updated-mods-python-terrain-update-get-famous-nov-18/p1
If it still doesn't work I suggest taking out half of your mods and CC and testing the game. Then keep splitting until you find all that is broken.
Either update or remove the broken CC/mods.