Shelly 1PM plus mini cannot be found in my app (newbie question)

Hello,

I have just installed my Shelly 1PM Mini plus in the wall outlet (no switch involved). It is part of a circuit with 4 different wall sockets looped through to each other.

When I open the app (after signing up, etc), I click "add device", but the device is not being found at all. Not over bluetooth, not through a WAP. I also don't see a new WiFi network being started up, so not sure what I could be doing wrong? (is it related to incorrect wiring?)

I have pressed the tiny button 5 seconds, 10 seconds, etc. But nothing has changed.

I have created a wire diagram as you can see in the attachment.

Any help is welcome and I have to say I am a newbie, so please bear with me, in case I may have missed something obvious.

Thank you , sir! That was indeed the issue and I now have the outlet connected and turned into a switch.