Unable to sign in to the Apple TV app
My apple TV app is not allowing me to sign in, it says Something went wrong, there was a problem connecting, try again
[Re-Titled by Moderator]
The exact years of introduction of that model is of importance here, as well as the smart platform (Android TV, Fire OS, or other) and its software version. Things that a model number would tell us.
I think the oldest model Panasonic TV that supports the Apple TV app, was from 2017 (4K EZ/EX Series). [Not that old, imho.]
Or maybe you have an external HDMI-connected streaming device with the Apple TV app? Then the make and model of that device would be significant instead, as HDMI devices bypass the smart TV functionality.