Chat uses port 8080. If your computer can't reach port 8080, it will display that message.

The most common cause of your computer not being able to access port 8080 is either a firewall or virus software running on your computer. You can usually allow an exception for specific sites (like ours), rather than needing to shut down your firewall or virus software altogether.

Sometimes pop-up blockers might be causing the issue as well, which is why there's an option for the "No popup chat."

Hope this helps,
DocJohn