Seems like my save data doesn't want to exist. Is this a known New Threat thing or should I just go ahead and reinstall the entire game and mod? Luckily, I'm on a new playthrough so it's not hard to start again, but also, I don't want to start again.
EDIT: Fixed with a reinstall, now if I can just solve my controller issues
EDIT 2: Unfixed, my saves are still deleting on close of the game, which is mildly frustrating to put it lightly.