I joined a T4 raid but was unable to join them or move past one room. I entered a room where I was given a quest to destroy an amber something containing Lu Zhi, and have a quest to do that. There was a round doorway I could not enter. I was told that there was supposed to be an amber sphere with a woman's hand coming out of it that I was supposed to smash. It never appeared, and I was unable to follow the raid further and had to drop.