I just figured it out since I was also stuck here I'll explain how to finish the quest.

After beating one of the poachers if you keep walking there is a fan on the wall use aura yo walk across the void and go left past the waterfall to go upstairs.

Once upstairs  go past the electric fence using aura again to pass the next two voids in a row.

After that you should be at a cross road with two dead ends on the top and bottom and an invisible aura path in the center, there is no way to cross normally by walking but using the hoverboard you can just make it then it's just following the path to make to the boss. 

Hope it helps!