Getting error message: Upgrade failure. Please restart the application

@user_uyieex​ 

It would appear the version of the Xfinity App you have is downlevel.  The most recent version is 8.15.1.3747. Xfinity just pushed that update out 2 days ago when everyone started posting about this problem, me included.

Now that they updated the App you will need to get your devices updated with that version.  Xfinity can’t do that for you.  If you don’t know how to update the app on your device(s) the best thing to do would be to uninstall the app on your device, go to the Amazon App Store and download the Xfinity App again and that should be the latest version.  Hope that helps. 

Thank you for posting on our community page! @ldinpa provided some very helpful information❤️. After reviewing their response to you, do you still require assistance?

@XfinityMelinda​ 

No assistance required and thank you for removing the very vulgar comments from one of the Users I tried to help.  I hope that individual was banned from the forum.  There no place here for that kind of nasty vulgarity towards other Users.

@ldinpa​ My firestick are 4k Max 8.1.7.4 (rs8174/3696) with Xfinity stream 8.15.1.3747 and none work

That’s crazy.  My set up is the same.  Both firestick software and Xfinity App latest versions yet the latest Xfinity stream app update fixed my issue but not yours.  At this point couldn’t even imagine what the fix would be.  Sounds to me like Xfinity support needs to engage with Amazon support to try and figure it out.  The Xfinity reps monitoring here need to get this escalated to higher level of support. I’ve been there on a different issue ☹️

@Xfinity is there any progress on correcting?   I just cleared cache - data - uninstalled - forget network - turned off TV removed firestick (for 30 min) -connected stick directly to Xfinity WiFi - restarted firestick - installed app and still nothing but the 3 dots on the screen trying to load the app. 

@user_12zf0r Thanks for troubleshooting. Does it continue if you reset the stick to default and factory settings?