The Vono Islands
Here on the ship, Dagran will say that both Yurick and Mirania have places they want to explore on the island.
In order to move past this point, both Chapters must be cleared to further the story.
It doesn't matter what order the chapters are done in, as long as they are cleared.
Head towards the area with the shops to talk to Yurick, who is standing near the Upgrade Shop to go to Chapter 14.
In the opposite direction where there is a sealed door and a man trying to open it, Mirania will be standing there looking at some plants, talk to her to go to Chapter 15.