Streaming app not working

The Xfinity streaming app is not working. I get a message that says upgrade failure, please restart the app. I have done EVERYTHING. Hard reboot, uninstall and reinstall the app (many times), unplugged everything, including fire tv and Xfinity gateway, forced stop, cleared cache and anything else i could find. TV is up to date, also received this message on another tv. When i log into Xfinity stream it says no devices are streaming. I need this fixed!!!