@Marvin_S thank you for your reply. Your answer is clear and gives the insight that the scenario that i have in mind unfortunately wont work.

I want to extend an existing network across a gap that does not have UTP or power network. So I'd like to use a Powerline to connect to an existing wireless network and then extend the network using...

@Fae I tried updating but it failed: Failed (1) 28-EE-52-56-2B-6A upgrade failed: The upgrade file is invalid. Please select a correct file. My device: TL-ER7206 v1.0 1.2.3 will try to see if local...

@d0ugmac1 thank you, that did the job. I was able to revert to 1.2.3 firmware for the router. Subsequently i was able to adopt the router again. Hopefully 1.2.3 is working okay with Omada version...

@Unraider Id would if I could, but hard reset is not working. Holding reset button only ends up rebooting the router Reset procedure as described on TP-Link website does not work. And since I cannot...

@d0ugmac1 I already used that account to login on the router, but does not help me: Server Error:403 Forbidden. Permission Denied: Omada Controller Software is running. Web Server is forbidden. Omada...