To access the last quest from the Evidence Board in the Mars Enclave it requires to do all the previous missions to unlock it. The Preservation mission doesn't exist on the Throne World map and there is no other way to get to it. All the suggestions I've found that some people have given were entering the Raid to trigger the cutscene and then returning to Orbit, of it being a weekly rotation mission, of abandoning the mission and then picking it back up in the Tower or of restarting the game right after the daily reset; but nothing works for many of us. Does anyone know if Bungie is aware of this error or does anyone have some other suggestions that did make the Preservation mission show on the map for them? [I'm playing from PC, in case it's relevant]