I am at Kaer Moren after finding Ciri before the battle.
Inside Kaer Moren, I found a chest whose loot started "Berengar's blade". After reading Berengar's notes, it tells me to talk to Vesemir.
Yet talking to him does not work as it's only pre-battle talks. (Geralt only tells Vesemir that he seems to be in a good mood, no real interaction happening.)
When I progress to start the actual battle, the quest fails immediately. So while this quest seems to be glitched, I wonder:
Is there a way to solve this quest without talking to Vesemir so to only have this part of the quest fail and not its entirely?