Hi, really thanks for the reply.
I have abandoned and re-taken this quest many times,
but after I talking to Kargath Duran this message shows up .
If I select "Yes" Kargath Duran will transfer me to the same place and there is nothing change.
I also try to wait for the quest reset by the system,
But this situation happened 12 hours ago and these NPCs are still standing there.