Well, I say humble and heartfelt thanks to Morham for the 02/12/12 post to be sure you are trying to get into the Justice ship in the Unknown Regions and not Tavus's ship in the Distant Outer Rim. Once I went to the right place..no problem..no redscreen. Completed mission..now able to pursue Class quest storyline. Thank u so much for taking the time for the post..I never got this hint in all my tickets to SWTOR Tech Support.
Im glad I read this before sending in tickets for the exact same problem