Sign quest help

[Zerosk]

At the part where you give the Symbol of the Nine Realms to serin and defeat the monster's that she summons. She is suppose to send you to the witch's room after she passes out. Instead i was sent back to niff. and now non of the npc's will continue the quest. I talk to serin again and all i get is ".........", talk to gen and he congratulates me for getting the symbol, and the witch keeps sending me back to umbala. How do i continue the quest to get the sign any help would be appreciated.