So I've just finished the first quest where you find serana and become a vampire lord by Harkon. Then he tells me to go fill the blood chalice but every time I try to ask Serana to come with me she just answers back in the vanilla dialoug like "Yes" "need something" and I can't activate any other speech option with her. Anyone know a fix. PS I'm on Ps3 so no console commands will work and no I can't go back to a previous save.