Aeon Gen 5 Recessed Door Sensor not connecting

I’m new to the whole Smartthings world and slowly building my system…
I recently got one f the Aeon Gen 5 door sensors and am unable to get it to connect.
I’ve tried with it setting next to the hub and while pressing the connect switch on the sensor, no joy.

Any suggestions for the new guy ?

nevermind. i kept tinkering and got it to work.
I had to exclude the sensor and then re-add it.