I am stuck at a point for the second heist. I am supposed to steal some stuff from the docks. I already took the sub and the helicopter safely. After that the game sint going anywhere. I was saving lesters missions for Franklin for end. I thought maybe that was the reason but even after playing first two Lester's missions the game isnt going anywhere... Trever seems to have no mission or objectives, only Questions marks left for him.
What am I supposed to do here?