Is there any way to download older versions? All the mega links for them are empty. I have a rather old save (21.1) I wanted to upgrade but jumping this many versions simply doesn't work. I really don't want to start over considering I had a lot of hours in the game.
Unfortunately, there isn't. And yeah, that's definitely too many versions back to be compatible anymore. If you're on desktop though, you can navigate to the folder with the missing file, and put a dummy file in there to trick the game into thinking everything's fine. Then just save your game and it should work, although I think you'll need to do a NG+ anyways to ensure everything works properly