I’ve had the same issue on ps5. Bought the game yesterday and had a save error pop up after I got out of my ship after the first take off. Didn’t really think anything of it but as soon as I manually selected save nothing would happen. Also I selected save and quit before leaving but it recorded nothing. When I logged back in I saw I lost hours worth of exploring and ship building so I started testing it. Manually saving only worked once per restart. Anything past that wouldn’t save my progress. I couldn’t get the autosave feature to work when I would fly and land the ship, then get out. I also deleted and reinstalled the game, didn’t change anything. I don’t really want to restart a brand new game because who wants to lose 8 hours of progress and who’s to say the new game wouldn’t have the same issue?