Ideas

Hero+

1 year ago

Status:

Under Investigation

Load Error Code 800/801

Issue When trying into a lot, you are greeted by load error 800/801. Buildings start to disappear and you also get endless loading. Similar issues Please check out this thread for similar issue...

New Novice

6 days ago

My saves keep losing custom-built lots - they revert to the base game default version, even though households/Sims data stays intact. This has now happened on my original save AND a brand new fresh save, so it's not isolated to one file.

What I've tried:

Cleared all cache files (localthumbcache, cachestr, avatarcache, etc.)
Fully reinstalled the game
Created multiple fresh Sims 4 folders/saves
Tested with Mods folder completely removed - issue persists
Confirmed it's not CC-related since it happens with zero mods loaded

This also caused a related issue where apartment lots specifically became unopenable (error 801, walls up/down grayed out) in one world, which was fixed by starting a new save - but regular builds still keep reverting even on new saves.

Platform: Mac, 2024 MacBook Air, M3 chip, 16GB RAM

Has anyone else experienced builds reverting to default, or found a permanent fix?