I've had all my Dimmers connected in the past with no problem.

Recently Comcast sent me a new modem and I had to re-add a few things to this new network.

3/4 of my switches connected no problem...but my 4th one won't connect.

Ive Reset/Restarted it, the lights blink green/orange, I follow the set up instructions and connect to the TP-Link_SmartDimmer_2FEA network for the switch, then it asks me to choose a WiFi network to support the switch...I choose mine. 
 

In the next step the app is trying to secure the connection and stays loading forever until finally telling me there's a problem.

What I cannot conceive nor understand is how all of these were working perfect on my previous modem and now 1 of them won't.

ALL the other switches connected without fail and now this one is giving me an issue????

SOMEONE PLEASE MAKE IT MAKE SENSE