Also another thing to test and to ensure the system is operating normally is to put your phone on LTE/5G and try to log into the Deco's UI from the Deco app. As the Deco is a system based in cloud technology and remote mangement, the reason you need a TP-Link ID to log in, then if you are able to manage on LTE/5G the Deco would be working correctly as you need cloud and internet in order access from a remote network.