Xfinity streaming on PC with browser (TVAPP-00281)

Watching on my 2nd monitor, I use to stream xfinity through chrome all the time.  The last 3+ months, it's been hit or miss.  Calling support is a joke. They will just reset all my equipment which doesn't fix the problem.  TV is fine.  App is fine.  It is only when using a browser on my PC.  Logging in and I see all the channels, however there is no preview picture. 

Interesting though, if I started an on-demand stream before, I can click on it and continue to watch that program with no problems.  Everything else including live TV and it will get an error trying to load (TVAPP-00281).  Makes me think that when I go to click on something new, it doesn't know how to link properly to the streaming channel.

For the record, this pc is directly plugged into the xfinity cable modem.  Clearing cache, data and browser settings doesn't fix it nor does trying a different browser.  And like I said, eventually it will just start working again without doing anything.