Zebra_Tink1029 Mods that you think of as trait mods won't be the only ones that call on the game's trait coding. You'll need to use resources like the ones pinned in this server. For mods you use that aren't supported here, make sure you're on a current version that's confirmed compatible with the game. See also vanilla and 50-50 testing - vanilla to make sure a mod is your problem (although removing mods can also cause errors in a previously played save if the game is now looking for that coding), and 50-50 testing to narrow down problems.