Trending feature not available - DirecTV

I get this message when I choose the "Trending" feature:

Error code: 0 - Page formatted incorrectly
a9h: Script loading failed
kx: Failed to load resource
WebException: The remote server returned an error (503) Server Unavailable

What's going on?

This question, "Trending feature not available," is about DirecTV channels, programming, equipment, and sports.