Items visible in CAS don't work

Hi

I have been playing the Sims 4 since 2014 and have a lot of packs. I haven't opened my game in like 3 months, and now I was ready to play again. I made a family using the items in CAS, matching the packs I have installed, but when trying to save the household or place it, the game tells me, that I have used items, that isn't installed. I have narrowed it down to, that it is Growing Together, Horse Ranch, For Rent and High School Years, that doesn't work. I have tried everything google suggest, clearing cache, deleting the packages, clearing "thumbfiles", repairing the game, the "vanilla-method", starting a new save. I play with some CC and have previously used the invisible crib mod, but have deleted the mods and almost all of the CC. Removing the CC from the folder or playing without allowing mods, doesn't work either. I can place the family, but the game crashes, if I try to load the household or use the family. My sister has the same packs and same PC as me, she has deleted all mods, but it doesn't work for her either. When doing the vanilla-method EA-app told me something needed to be repaired... I did that, but it didn't work either.

I am out of ideas... How do I fix it?