can't stream xfinity tv with Safari on my Mac mini

Same here. Everything else appears to be working with the update of Safari including the Xfinity website and all it's other features. (That's including banking sites and cams.) The streaming link just continues to cogitate saying "Now connecting to your entertainment experience". I tried everything I can think of. Is there a setting that needs adjustment? All appears the same as it was.

I'm running all updated current system software on a iMac (Retina 4K, 21.5-inch, Late 2015). The Xfinity stream worked perfectly just prior to my updating of Safari. The stream works just fine in Firefox.