Class Warfare Event still Glitched?

I was able to get into the Class Warfare to fight the boss once yesterday and after that I couldn't get it to work again. T_T
I keep getting the message: "You cannot enter at the moment. Please try again or change channels."
I've tried changing channels and it still doesn't work. Any suggestions? I just need 4 more bosses

Yeah, I am getting the same thing. It worked for 2-3 then broke again. Was so close to getting greatest...

I really wish they'd extend the event, it's been three patches since it first broke for me and it keeps breaking after just a few matches, lol.