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I like to stream TV online also so I can imagine how frustrating it is to get this error message on the TV provider login screen. 😞
We will need a bit more information before we can determine what is causing this error.
We look forward to your response!
In a situation like this, the first thing that I would recommend is to restart or reboot the Firestick.
If your Firestick is the only device that won't connect, you should contact the manufacturer for further troubleshooting support that's dedicated to this device.
If you have multiple devices that are having connectivity issues, then we should troubleshoot further.
Should you be having issues with multiple devices, please free to send a private message to @CommunityHelps so we can assist you further. For more information on how our Private Messaging system works, you can find out more here.