Yes, I have the same error. I am still in Act 1 pretty much at the end in Underdark. Tried everything, but still can't save error code 558 popping up all the time. 90% of the time I can't even load those save games. It crashes the whole game. I am playing on PS5, so no mods, no nothing.
I also have another issue, I am not sure if it's related or not. Since I have travelled to Grymforge in Underdark, both the minimap and the regular map go black (undiscovered) whenever I fast travel, go to camp, or just travel between zones. Basically, I have to rediscover everything, but the fast travel points keep unlocked.