Abandon the quest and retake it again from Jaina on the ship. The cutscene will repeat and it might blackout at the same part again but let it load for a bit. It's just extremely slow loading even if ...
I have the same issue and so did a friend. After the cutscene, it's just a black screen and I have no choice but to F4. Relogged and I'm just stuck on the ship, not able to interact with anything or l ...