In the main storyline after you kill the huge spriggan to get the corrupted crystal, you return to gridania and talk to Cid on the Ariship docks.

I turn the quest in at level 43, the next quest doesn't pick up till level 44. i left the dock to finish the level off. But now i cant return to Cid to pick up the quest, because the docks are inaccessible. there is no NPC option to get onto the docks to talk to Cid again.