I'm on PC and in the middle of the quest Who Wants to Live Forever with Stephanie St. Clair. I've checked off the objectives "Return to Bumpy" and "Talk to the guards in front of Dutch's place", so now the only one remaining is "Clear out the Derelict Building." Only problem is that the "Attack" option on that building (marked by the quest marker) is greyed out. For what it's worth, I used the non-violent intimidation/persuasion options to get to this stage. The building in question isn't in my precinct but in one adjacent to one of mine. It's owned by the Gennas, whom I am NOT currently at war with, if that makes a difference. Creating new saves/re-loading hasn't seemed to resolve the issue. Any ideas?