If you are not in combat, you should be able to press RB on a controller, not sure what it is on KB honestly, and it will take your camera view right to it. It happens to me all the t time, if it isn't prompting, it typically means your in combat (or the game thinks you are) or you don't have it yet which you obviously do. So, that sounds more like a save file issue with the game running than the quest itself.
If that is not happening, leave the area, go back and test it.
Manually reload the save from the main menu and test it.