Xfinity Stream only showing To Go stations, not any regular channels that were available about a month ago.

I have had an Insignia Amazon TV that has the Xfinity Stream app for almost a year.  Recently, I cannot get the regular channels selected from the menu, because any selection defaults to TV Go after a three dot screen that bubbles for over one minute before changing the station.  This limits the content available from Xfinity on this television.  I am accessing it through my Xfinity Wi-Fi.  I also recently started receiving Playback 1001 error 4 errors on the regular channels as well.  Device statistics show that Amazon updated their software August 5 and Xfinity performed service for the entire community last weekend which resulted in intermittent service as they apparently cured systemwide issues. I have cleared the cache for Xfinity Stream on the television and have restarted it several times.  How do I get all the content I am paying you for on this TV???