u/5neun5

Me and my friend bought the pc game pass from xbox yesterday to play the game and started a coop playthrough. After roughly 3 hours of play I noticed that I wasnt able to save the game, not with the manual saves, autosaves or even the "save and quit" option. Today I wanted to start a new world and play it to the point where we left of yesterday so we could play in the afternoon but the game still won't save.
I've reinstalled the game, repaired it etc. nothing helped so far
Does anyone have similar problems and if so how did you resolve it?