I play the Combo mod which is based on this mod, but only version 1.3.18.7. I started a new game, just to make sure nothing went wrong in my actual one, but it's always the same.
I didn't care about the Aran, but it's the same with the "Balance of Power" plot when you have to dock your Simitar to the ATF Research Station. It's there, but can't be selected and therefore I can't dock at it.