Guessing a named unit that you must interact with is stuck in a particular room. Sorry trying to be very discreet.
Summon up a cat and use meow. Keep moving the cat and meowing until you get to his table, which is next to the flight of stairs. There was a previous tenant there who is gold in color and wore a monocle, who is no longer there. You'll be able to now interact properly with the quest giver.