How much time it will take to released the game it is still in development and i saw you launched this on 2021 and it is now 2025 but still in development
The engine needs the config and global files too, if you're not saving those, that's why your save files aren't working. Fortunately. there's a workaround, you can start a new game, save it as soon as you're able, then copy your old saves across, overwriting the save you just made. They need to be in the same save slots, as this will create new config and global files that will be looking for saves in those slots. So if your current save is 0001, create a new one in slot 1.