Crash and out of HC - Piety fight

Seriously, Piety fight and the client crashes, for not only me but most in my group.
I died and got demoted to default league.

The only way to die in this game is by the game client alone.

Sorry, just getting so frustrated now. Level 57 gone.

No clue why the client crashed. Got hit by a frost arrow and it just stopped responding. Another person got not responding as well a few seconds later.