Does your router have a 2.4GHz connection?
All Goldair Wifi products require a 2.4GHz wireless connection. If you are using a 2.4/5GHz mixed network, make sure your mobile device is connected to a 2.4GHz network at the beginning of the setup process. To differentiate between the two wireless networks may require the 2.4GHz and 5GHz networks to be 'split'. For instructions on how to do this, please refer to your router instruction manual for specific instructions relating to your router model or contact your service provider.
Once you have the 2.4GHz and 5GHz networks separated, connect your mobile phone / smart device to the 2.4 GHz network. If your device is automatically switching back to the 5 GHz network during setup, you may need to forget the 5GHz network. You can re-join the network after set-up.