Chanise517 Test your mods and custom content first, if you use any. You can start here with a list of known broken mods, including which ones have been updated:
https://answers.ea.com/t5/Mods-CC-Issues/Broken-Obsolete-and-Updated-Sims-4-Mods-1-108-July-23-2024-Game/td-p/13891143
Anything not on that list, you'll need to test yourself. If the number of mods is large, the 50/50 method can make the process much more efficient.
https://modthesims.info/wiki.php?title=Game_Help:Finding_Problem_Custom_Content#The_50.25_Method
Once you've done that, I'd suggest testing one save that you know was previously affected. If you still notice any problems, stop here and describe them.
Otherwise, move over the rest of the saves, plus the contents of Tray (saved households and builds), plus Screenshots and Recorded Videos if you care about those, and the UserSetting.ini file for the login rewards. The rest can be discarded.
mztthew Please test without any mods or custom content, as in, move the Mods folder to the desktop and delete localthumbcache.package. You don't need to save your progress; this is just for testing. If that doesn't help, try the clean folder as described earlier in this thread.