Earlier, I saw an "unable to save game" error, but it didn't crash the game and autosaves kept happening, so I figured it was a one-time issue. It seems the game state became corrupted and was then saved to those files.
All of my autosaves will crash when loading. I've attached the latest one here. Loading an older manual save works, but my latest manual save is over 24 hours old.

It would be wonderful if someone could fix the save data somehow, but I understand if that's not possible.