I am playing AC Valhalla on Xbox series X. I'm about 110 hours into the game. After I am done playing for the day, I typically manual save and then turn off my console. Every time I use the quick resume feature, I immediately get an "unable to save game" error and cannot continue. If I completely quit the game and restart, it works fine. If I quit to title screen before turning off my console, when I resume the game, it will act as if I have no saved games to load. Again if I completely exit the game and restart it , my saved games are available and everything works fine. This happens 100% of the time I use Quick resume. It has been going on for about six weeks now.