You will need to accept the quest in Okasankar before you can progress it in Motazzar, There is a named miner north of the Motazzar village, he will want 2 fruit from the exploding cactus to the north. Once done he will tell you he will smash a rock for some helidium. Watch him slowly pick up a rock and walk south to the walk crusher to crush it, and finally hand you the helidium. Next head to Talanzar and find Aridum near the Okasankar portal and he will craft the boat light, once he gives it to you head back to Okasankar and platform jump your way up near the leader of Cyana and replace the boat light.