We are having some issues with the "Hangout On Air" interface and have switched to a "vanilla" Hangout instead, please use the link below. To bring up the chat, I think that you need to switch to the "old" interface, if someone knows how to bring it up in the new interface, do tell me.
https://hangouts.google.com/call/pgmr7xuokzgwlbtm6gosuvu6aee
