@terziyski what site/app is that you are using? I am unable to get the tether app to connect to the extender so I have been using http://tplinkrepeater.net/. The closest I see to your screenshot is...

Trying to set up an old RE200 as my smart home subnet repeater which is a network that is hidden. I can connect to it but cannot hide the repeated signal SSID. Can and how would I go about doing that?