Yeelight E27 connection failure but in the DHCP list


I just received my first e27 color led bulb 2 today and was trying to install it.

The Yeelight ios app always fails at 25%.
The Mi Home ios app just keeps me in a loop to reset the light.

Yet, the light appears in the DHCP list of my router.

How to troubleshoot that ?
I tried US, singapore, Mainland China servers, to no success.