@Halyanne, do you happen to be playing with Mods or Custom Content (CC)? 🤔 If you do then that could be what is causeing the problem. Everytime EA releases a update/patch, there is a chance that it will make some Mods/CC outdated. ☹️
To test to see if one of your Mods/CC is causing the problem, please do all steps of the following:
1) Move your Mods folder to your Desktop
2) Delete the localthumbcache.package file in the Game Folder
3) Repair your game in Origin by logging into Origin and to to your Library. Right-click on The Sims 4 and choose the option to "Repair Game". Wait until Origin fixes all of your packs and not just the base game.
4) Now when you turn on your game it will create a new, empty mods folder. Check your game to see if the problem is fixed.
5). You can now add your Mods/CC back one at a time checking the game each time to see which one is the culprit. If you have a lot of Mods/CC then you might have to do the 50/50 Method.
6) When you find the culprit(s) you will have to go to the creator's site and get updated versions of these (as soon as they update them) that work with the patched game. You will have to use the new version in place of the broken ones.
It is the responsibility of the Mod/CC creators to update their items when EA updates the game. It is the responsibility of people who use Mods/CC to make sure the Mods/CC they use are up to date! 🤨Mods/CC do require regular upkeep! 😞
If you don't play with Mods or CC, then you can ignore what I've posted 😃 , but please update us on if you use Mods or not, and if you were able to fix your game! 😇
Best of Luck! 🥳