Boss Ritual Dorah

Hello, I'm having a problem with the Bodah boss, the Ritual boss. When
I enter him, knock down his energy shield, then follow the lights, the
arena turns black and nothing changes. I die in the dark. Every
attempt doesn't help. Is this a bug or am I doing something wrong?
Others say everything works fine for them.

Its a bug. Every quests are bugged....

Same here.