I tagged along with a group running Sandoria Mission 8-2 "Lightbringer" when I was level 63. After defeating the two popped NMs and receiving the cutscene, I went back to the Chateau only to find that I cannot enter the audience chamber to complete the mission. At this point someone in the party mentioned that you need to be 65+ to complete it. So I tried again at 65 and 70 to complete it but no luck.

Halver won't talk to me, when I click on the audience chamber door I get the message "Entrance by appointment only", and the gate guard tells me I need to complete my current mission. I think it might be bugged for me. Any suggestions?