I was doing the quest where Serena and I enter the Soul Cairn and I put all the stuff in, but now she won't give her blood and follows me everywhere. This is preventing me from doing any other quest and can't sneak because she is around. How do I fix this?
Bugged Serena quest in Soul Cairn
skyrim-dawnguardthe-elder-scrolls-v-skyrim
Best Answer
The quest is Chasing Echoes and you are trying to open the Soul Cairn, correct? The Elder Scrolls Wikia page lists a few known bugs with suggestions for fixing them.
On PC, you would find this bug relevant:
On xbox/playstation, you would want to refer to this bug:
The UESP page for the quest lists similar bugs and has additional suggestions for fixing them on the PC. Keep in mind that on console, you will most likely have to load an earlier save.