I accepted a quest from my father in law in game who is a lord of the northern empire. He wants me to capture a certain battanian lord for him within a year. The problem is I captured him and the quest log says to drop him off at a settlement owned by my father in law. However he has no land since the northern empire are down to one last castle. i tried giving him to any nothern empire settlement as well as my own with no success. He refuses to join my faction so I can give him land, so there is no way to finish the quest