De Vass is on the right hand side of the map. Below Two Sisters, to the right of Tega.
Note, though, that Roland Consortium isn’t supposed to be accessible until mid-November. I don’t know how or what makes it accessible yet, I’m just going on the 1.0.2 patch notes. If the system is greyed out on your map, and it’s nowhere near November yet (check the in-game date at the top of your PDA), then the station isn’t accessible yet, and having a passenger destined for there is probably a bug. Best send your save game and log to the developers.