Hero of Gavel Quest help

Hello, I was doing the hero of gavel quest, and just did the parachute thingy and the NPCs would not spawn ( I kept relogging and char/hub) but they never appeared so I /kill and now I cant get near the quest area to trigger me finishing it since its oob what do I do?

EDIT: the part in the quest im up to is the ???, which I believe is the end since I am back at the airship dock.

 

I am also stuck here - I only get the "Woah! The parachute worked!" dialogue and then the NPCs don't show up at all and I'm stuck in the invisible box where I can't move.

 

I am also stuck at exactly the same point after using the parachute. Just says "Woah! The parachute worked!" and then nothing happens