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Hi @Skying6200 . Do you play with mods or CC? Could you please test without? Exit Sims 4 then drag your Mods folder to your desktop. Then delete the file called localthumbcache from Document > Electronic Arts > The Sims 4. If you think you might accidentally forget to exit without saving after testing, copy your Saves folder to your desktop too, to back it up. Now open Sims 4 and see if you still have the problem. If you don't, you can start the process of figuring out what from your Mods folder was causing it.

@hadelx76 You can start with the lists at Broken/Updated Mods (broken, updated, previously broken) and the previous lists it links to. But if that doesn't help identify it, you'll need to do a 50-50 on your Mods folder. This means organizing the files there into bite-size batches (with any files they require, like XML Injector or a Core Library mod or mesh) and testing one batch at a time.

For each test, delete the file called localthumbcache, then put only that batch in Mods. If your game behaves as you expect, set that batch aside as "cleared" and delete localthumbcache again. If it doesn't behave as you expect, take out half the batch and see if you're closer to finding the culprit. Remember to delete localthumbcache each time.

You'll find some 50-50 method tutorials online too. Once you isolate the file, you can go find out if there's an updated version.