Guild Wars 2

after defeating rakts downstairs bots and lackies.
i go upstairs , i get the cutscene , the forcefield disappears i attack and get insta dc with a 7:11 error.

tried it a few times now , never had this before on any quest but this just blocks my progress ;-(

any one knows a solution or work around.

other then this the game just runs fine .

am i the only one with this problem ;-(