I have had issues with being in an "Active Phase" despite having already finished the chapter. This would prevent me from going to flashpoints, uprisings, story or planetary. I would have to go to the imperial fleet and log out then switch over to another character. When I would log back in to my main the active phase would be cleared and I would be able to go about my missions. My Referral link http://www.swtor.com/r/2c9QjS