Alright here is my problem. On the Xbox One In the Skyrim Dawnguard DLC Serena asks you to take her home but when I do She will not start the dialog when you are walking up to the castle, so the guard at the castle will not let me in the castle because he wont talk to her. With that being said I've tried multiple saves, play throughs, and fast travels to fix the problem nothing works. Note that this hasn't just happened on the Xbox One I'm playing on but it has also happened in the PlayStation 3 I have.