There is a broken link to the "Ballers" tv show on the HBO Network page (http://xfinitytv.comcast.net/tv-networks/HBO/56/main ).
If you click on the television program "Ballers," it directs to this URL:
That link gives the "Hmm, we're having trouble" error message.
The link should direct to this URL instead:
There's some extra junk in the URL, "/tv-networks/HBO/56/7/," that shouldn't be there. If you remove that junk from the URL, you get the webpage to watch the show.