January 2018 - last edited January 2018
After a big pack or update like the one that came with The Sims C&D many mods/cc become incompatible, and you need to update them. Try to remove them and see if the game works better.
For example, move the Mods folder from Documents>Electronic Arts>The Sims 4 to your Desktop and start the game.
If that works but you want to keep your mods, you can try some different things to sort out the ones not working:
yes, i do have a lot of mods but my sims are like, all cc.. like hair, clothes, makeup, accessories, shoes. if i remove them all to find out which ones are broken, can i still go onto my sims and see if things are broken?????