pixel_player16589305 I was stuck at this point too but when I turned away and went back to Jack and back to the tunnel, it opened. Other sections of tunnels did the same. I also am having problems with characters disappearing. I couldn't find the last pirate in Tortuga Bay and zoomed out and no pirates were on the map. I watched the walkthrough video and when I double checked one of the houses a pirate ran into, when I came out there was a pirate on the docks. On the next part, talk to Jack at the southern gate, he wasn't there. I finished watching the video and it showed him there so again I went into a building, came out, and for a second he wasn't there but then suddenly appeared. This has been the worse event I've played. My energy was maxed while I was looking for the pirate everywhere so I lost quite a bit because no regeneration was occurring.
