@TP-Link First of all thanks for such response. Since you mentioned I only tested the Deco app update method and it didn't work. After your kind suggestion I did the web approach but it returned no...

Greetings So I have the E4 set as AP mode hard wired from the main router and that's the third attempt I make on trying to update the firmware on the E4 and it never works. "Not possible to verify...