We have experienced the same issue. Initially we reset the Kindle Fire to the original state, downloaded the Xfinity Stream App, rebooted and launched the app. We continually get "Connection Error....". So first to Amazon and they verified that all is up to date and working. Also Netflix and Amazon stream shows just fine. Next to Xfinity support and were told to uninstall/install/reboot/launch the Xfinity Stream App. We'll back to the "Connection Error....". The representative then said that it was our actual connection of Xfinity and they are sending a technician to diagnose/rectify the issues. Two days latter we received a call from Xfinity support (original technican escalated) and they said that nothing was wrong with our equipment or the actual connections. They wanted to do the uninstall/install/reboot/launch all over so we did that. Nothing but the now infamous "Connection Error".
We were pretty frustrated and inquired about backing out the latest Xfinity Stream App for an older version but were told that was impossible. I requested that they file a bug report with their application development team and was told that it was not possible. So much for Xfinity product development, quality assurance and technical support.
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