Having the same problem with the Charr personal story at level 20, “Searching for the Truth.” No prisoner (objective) to talk to and, oddly, there’s no way to leave the instance other than logging the character out, as the “leave instance” button is missing and the exit is bugged. I know there’s a separate topic for that particular quest line, but it seems to be the same deal. Kind of disheartening to hear that this has been going on for months with no clear resolution. :\