Have you tried your antivirus settings or extensions for your browser to see if maybe something like an ad block setting or VPN assignment is preventing you from entering chat? I don't do chat, but I saw this thread caught my eye, so I'm guessing that it could be something related to either your antivirus or extension settings, or if you have a special VPN set up. If it's the settings, you can try turning off one feature at at time temporarily to see if you can get in. Maybe that might help??