Cannot complete major quests

I am unable to complete the following quests.
1) MAGE CAMPAIGN "into the oculus"
I talk to the quest person (with a white "?" on his head), he just says "greetings". no other option.

2) ORDER HALL "Destiny Unfulfilled"
I flew to the place that it asked, nobody there, nothing to do.

3) LEGIONFALL COMPAIGN "Defending the broken isles"
I found the invasion (green skulls on world quests and the ship symbol), did 6 of those quests, and nothing happened.

I would appreciate any help, because I am really stuck at these quests. :(