I am having an issue with the Hide and Seek Dawnguard radiant quest. Gunmar sent me to Riften to kill a vampire disguised as a traveling bard, but this NPC is nowhere to be found and the map marker just tells me to enter the Honeyside player-owned house. However when I enter the house the marker just tells me to leave and go back to the main city area. I have searched every obvious place this NPC might be, but I am at a loss. Even though it is a radiant quest, this is game-breaking for me because until this quest is complete I cannot accept other optional quests for the Dawnguard.