What happened to iTunes Radio on Apple TV?

I have a similar problem. I get no previews of music on the home screen at the top. Then, when I click music, it starts to go into the app and a music note comes up with a pinwheel under it for a sec and then nothing but a blurred out white screen. I can still access music using Siri though. But that won't let me browse. This is the exact same thing that happened on my iPhone 6+ a week or so back. It just started working two days later, but with no explanation from Apple as to what is going on.

I guess I'll have to go back to roku for Pandora if I'm not able to access Apple radio

Radio is no longer available on the 3rd-Gen Apple TV. Also, to access it on the 4th-Gen Apple TV, you now need to have an Apple Music membership.