I found Oathbinders Sanctum and when I got to level two and descended the stair I got a popup roughly saying
'cannot generate map due to possibly corrupting save files.'
So i tried to save the game and nothing happened.
After a couple of more times trying I found I can no longer save my game or load any save file.
So I managed after multiple restarts to exit the Oathbinders Sanctum and sail away, and still i am unable to load or save.
Now I am stuck on the main menu with 30 hours of gameplay gone since i can no longer load a save file due to them all being 'corrupted' or something.