Unreal Engine 4 Kite Demo, Forest and Lake

I’m trying to make a first person scene using the Forest and Lake level from the Kite Demo. However, over the path there is a green grid that when playing the game, elevates the first person character I made and creates weird collisions at certain points of elevations. I’m trying to figure out how to remove this grid or align it with the ground so the collisions make sense. Any help would be greatly appreciated.