@takahe The username for my account was "one word" without spaces. Adoption of the TL-R605 was from the start a problem simply because it has a fixed IP address of 192.168.0.1 and it could not talk...

Although I've achieved to manually set the IP range to my own network, adopting the router is still a pain in the neck, despite following the steps. So I give up, probably will send this back to the...

wait a moment... an edit icon appeared under action... i was to slow i guess :)... ok lets continue with the following steps

Problem is: 3.1 Adopt the gateway... While it is configuring, quickly go to Settings > Wired Networks > LAN > LAN and you will now be able to edit the settings. I cannot edit the setting - nothing...

Could you shre with me what you did to get the Gateway adopted?

The issue is the Gateway needs an edit on the LAN so it can adopt. You should roll out a quick patch to fix this issue on the Gateways urgently! Not wait for who knows how long for a the V5 version...