uninstall and redownload the entire folder, if that doesnt work try and see if youre graphic drivers are up to date.I hope this could help
i watcha tutorial of how to update but hwne i followed it it didnt work i think i will try again anhoter day
Msure the file path is correct for the save code, It should be "user://save_data.cfg" not "res://save_dats.cfg"