*FINAL UPDATE*
Searched online and found other people had the same problem and it was due to me using the Itch sandbox so if anyone else has the same problem check that your sandbox option is unticked in your preferences!
Hiya sorry to bother but every time I try to save it comes up with an error and I've tried deleting and re-downloading again but it wont work >.<
*Update*
I've tried downloading the dlc's and the save function didn't work either DX