Re: Cannot enter the Tempest.
what fred said tbh. have you tried fast travelling to the ship and then jumping on, have you run manually to it and then run up the ramp? a clip showing it might help. also have you tried running far away, maybe going into a tomb so it loads a new area and then returning? I am also curious if you may be in a mission that prevents you leaving until you complete it as I dont really remember this specific planet 🙂