When I started the Rise of the Hutt Cartel expansion the game didn't play the cutscene intro for my characters, what happened ?

They just cut off the intro from the Countdown to doomsday (hutt cartel expansion)

How can I get this one, is only by schematics or dismantle ?

How do I return to the gravestone ? because when I press the play button i just return to the fleet and don't know how to proceed

What are these pvp grades, and how do I aquire this crafting box they offer ?

I'm also stucked in this part, he always stop losing hp when it reaches 50% and I can make him take damage

Does anyonw know how to solo kill this guy ? I'm playing with jedi guardian and everytime his life reaches 50% he just stop taking damage and I'm stucked