I'm stuck on the Key to the Turris mission. The mission is flagged in my menu, and I'm at I-8 in Ra'Kaznar Inner Court. When I try to interact with the Vertical Transit Device, it says "The baffling gadget seems to serve as transport to the lower floors." and no option pops up after. I can't progress any further in this mission unless the door gives me an option to get through. Please help!