"After completing the quest without convincing Chris Haversam of his humanity, he may simply say "Not now, its almost time for the Great Journey." over and over again without acknowledging the fact that they've already left without him. This can happen even if you convince him of his humanity through speech checks. If this happens, he will remain in the control room indefinitely rather than moving to Novac. In order to avoid this bug, make sure to first convince Haversam that he is human (make sure thats the first dialogue you make with him), and then its safe to start his quests (gather thruster and then the green substance). "
For me I used the Black Widow dialogues but persuaded him not to rig the rockets. After giving all the items to him he kept waiting there instead of moving to Novac. Simply run to ladders and get out before Jason Bright starts his speech and return back. You will hear him continue his speech (normally he doesn't continue after his first sentence if you wait there) and Chris Haversam will move to Novac.
For me I used the Black Widow dialogues but persuaded him not to rig the rockets. After giving all the items to him he kept waiting there instead of moving to Novac. Simply run to ladders and get out before Jason Bright starts his speech and return back. You will hear him continue his speech (normally he doesn't continue after his first sentence if you wait there) and Chris Haversam will move to Novac.