same here, dont know what i am doing wrong
Im not sure if thats the case for you, but I had that issue when I just ran off into the world and reached that location on my own instead of triggering the actual tutorial questline.
For me, said trigger was somewhere around the tunnel before the first actual enemy camp.
I cant tell you exactly how to fix it, only that if you didnt do any guided gun tutorial where you had to shoot people from a cliff, you propably ran past it.