Load Error Code 800/801

Seasoned Traveler

2 months ago

Yes, the game launches.
Buildings are missing. Started with one house. Now all buildings in Willow Creek are gone. I can see them on the map/overview, but when I enter the lot the house is gone. I cannot visit the lot with sims or build a new house on the lot. Sometimes the lot doesn’t load at all and sometimes I get error code 800. And something strange: When I enter a lot and the house is missing I can see the old/default houses on the neighboring lots. Despite them being replaced years ago, and not standing there when I enter that lot.
Sims are not missing, but their relationship/family bond between each other are missing on some of them. Not all relationships in entire families, just someone here and there.
Every save that I have used with this worldstate is infected. I haven’t really played any other worldstate and I don’t dare to start a new game yet, because I’m afraid that world will get corrupted as well. But when I open up Willow Creek in a new game, everything seems fine.
No, I play on Xbox series X. I do download buildings from the gallery, and have downloaded horses/cats/dogs made with mods to make them look more realistic. I do not know how to repair the game, and I haven’t uninstalled/reinstalled the game. But I can try that.
FYI: I have all Expansion Packs, Game Packs, Stuff Packs and all but two Kits. So I have a lot of content in my game. I also have as many rental lots that is allowed spread over the different maps/worlds.

Ideas