Move your Mods folder to the Desktop and delete localthumbcache.package. Then test the game in a new save.
If it works now check for updates to your Mods and CC. Add it back a little at a time while testing until you have found all that are broken.
I’ve done all that, that is what I did before commenting here
@Atlanta1912 and @Essie060 Did you delete localthumbcache.package as well? If not, please do so now.
If that doesn't help, please repair the game: open your Origin game library, right-click on the Sims 4 icon, and select Repair. Then test with your entire Mods folder still removed. If your current save is still bugged, test on a new save as well.
I always do I’m wondering if might be the UI extension
You will know if you followed the instructions to remove your mods. But yes UI Extensions is one of the many mods that needs updating after the latest patch.
