Hub has been factory reset and is connected to the internet. It first turns purple and eventually green. Hub appears on my virgin routers list of connected devices. I’ve installed and re-installed the app. I tap “+”, “device” , “wifi/hub”, “Samsung”, "Smarthings Hub 2015 (STH-ETH& Others), I add the location and tap “Next” and it goes dark for a second and returns to the "Samsung Smartthings selection screen (where I previously selected Samsung. I’ve tried different leads and networks.