Sometimes this step can take up to 1 minute to complete. If more than 1 minute has passed and the plus button is not on the switch screen or the phone app has not responded to the switch button press please follow the steps below.
If the setup flow is stuck on the + button step of setup, you will need to pull out the air gap switch. The air-gap switch is a small slider at the bottom of the switch. When pulled out (away from the wall) it disconnects electricity.
STEP 1: Pull out the air gap switch
STEP 2: Wait 10 Seconds
STEP 3: Push tab back into switch and let switch boot up.
See GIF below for guidance on the above three steps: