Getting error message: Upgrade failure. Please restart the application

Receiving this message when launching the Xfinity Stream App on all of my TVs.   I have a mix of Samsung and LG TVs and am using the Firestick 4k+ for streaming.  If I exit the error and launch again it will work, but the error returns next time I turn on the TV and launch.    I have cleared data and cache from the app but still get the error.