The quest "Gone Missing" has become uncompletable - because all the residents of the Crown pub, "A'tor's Oasis", have, erm, gone missing... making it impossible to hear the Crown Rumour necessary to progress the quest. (There is no problem with the Forebear or Garden Rumour.) I wore the Crown Dishdasha, went into the pub, and started drinking from the Inconspicuous Mug: but there were literally no NPCs there... only one other player who was similarly unable to do anything because there were no NPCs there to talk to each other.