KOMO 4 won’t stream as a TV GO channel

I get the following error message when I try to stream KOMO 4 as a TV GO channel on an iPad using the Xfinity stream app:

Playback Issue :: TVAPP-00243

We we’re unable to authorize live playback.

The other channels in the TV GO grid all stream OK.  Since KOMO 4 is listed in the grid should it also be able to stream?