ScratchX extension problem

Hi ,
I am trying to use Poppy Ergo Jr. with Scratch extension. I follow the instruction at I assumed that Poppy Ergo will connect my mobile hotspot automatically but there is no connected device.

Any suggestion?

This extension hasn’t been developed by people from Inria, it is more a community project.
Are you using a Raspberry Pi 3 on your Ergo Jr ?
Did you write the image for the extension instead of the official one ?