@SteveD123 Try the upgrade using a different web browser you can also try using a private/incognito tab. I always have to switch from a chromium-based browser to edge to get anything to install via...

@Roujo Going to get a memember of the staff to look into this for you. @Solla-topee Please advise Thanks

@Roujo Thank you for the info. If you look at the image you sent me of the bottom of your deco you will see that your deco uses frimware for region CA and not US the link i provide was for the US...

@Roujo Try the following in order. Power off / unplug the other (already-updated) Deco completely. In the Deco app, note the exact IP of the stuck unit. Open a browser and go directly to...

@Roujo See if the following helps Make the stuck unit the main Deco in the app, then try the in-app update again. Fully power-cycle the stuck unit (unplug 30+ seconds) while the LED is pulsing green,...

@Roujo When you tried just now were you trying this address? http://tplinkdeco.net. If so please follow the directions in my pervious post. Thanks