KERRYKELLY123 Please test this save with your Mods folder removed. If that doesn't help, please post the entire error code.
As a side note, patching itself doesn't damage saves. The problems come from loading saves with outdated mods, loading saves without certain mods or cc that leaves stranded objects (e.g. plates from custom recipes), and corruption from the effects of mods that changed save data in a way that is no longer workable. So while keeping a backup copy of your saves is great, it does nothing to prevent any issues that relate to outdated mods or their effects on your game.