For those who missed it: it's back! In the menu on top you will find the link to the chatroom. It's members only, so you have to be logged in on the forum to be able to go to the chatroom, but once you're logged in on the forum, you don't have to log in again for the chatroom.
Anyway, please click the link to see if it all works as it should. If not, let me know.
If you see white text on the light background, change your own text to black, go to options -> text -> 'Use my text color for all received messages'. You can change the theme yourself as well, if you want.
Go to chatroom