Didn't say if you're on a pc or phone/tablet.
The chat room through Windows now requires a desktop app to be installed. Tells you at the top of the page after you log in.
Macs currently don't have that option, but it's being worked on.
Same thing actually applies to phones/tablets. We have an Android app required, but not for Mac yet.
Phones/tablets haven't supported Flash in years, which is what the chats were built on I originally. And with Adobe announcing that they will be ending Flash in a few years many are making changes to start pulling away from it now.