Based on a thread I've got with @talesofourworlds where the trio fight a dragon.
Little lore, Victor does know the Abbey's innards... from years ago.
So his info's out of date (he has no idea Magilou left and thinks "Magilou" is an alias not to get hounded by passersby) and he's in no rush to fix it.
Dragon killing doesn't care whether the Abbey exists or burns to the ground.