There are stuck spots in this game. Usually they don’t matter much, because we can use Waypoints or log out and in without penalty. In Personal Story, these options are not available, and it can be very frustrating to have to start a mission over because of a bug.
In another game I used to play, there is a command “/stuck” that will teleport a player to a particular spot depending on the mission. The Personal Story already has a system where player characters that have died can go back to a previous point, all that needs to be added is letting player character who are alive do so. It is easy to prevent abuse: a character in combat cannot use the command.