Apple tv sign in error

Re: "When I try to login to Apple TV on my smart tv it comes up saying could not sign in wait a moment then try again. But I can login on my phone and tablet. How can I resolve this?

To check you are signed in to your Apple Account with the correct Apple ID:

See how to: Sign in to your Apple Account on the web or in your device settings - Apple Support

Eg: says:

"Sign in using the Apple Music app and the Apple TV app on your smart TV or other streaming device

1. If you didn’t sign in when you opened the app for the first time, you can use Settings in the Apple Music app or Apple TV app to sign in. Use your controller’s back button or left button to open the sidebar.
2. Go to Settings.
3. Select Sign in.
4. Enter your Apple Account email address or phone number and your password.

You can also scan the QR code on the screen to use your phone to sign in."

Trouble-shooting steps are provided if nothing above has helped:

You can: Learn what to do if you can’t sign in