"Unable to get" means the device might not be connected to any Wi-Fi, i.e. the device might not be configured. Make sure that the Wi-Fi signal is strong and is turned on, and make sure that the Retrofit module is plugged in/powered on. If this did not work, try resetting the device by toggling the first switch On and Off, seven times within 7 seconds; then reconfigure the device on the mobile app.