It was easy to set up simply by following the built-in Setup App. I am using an ASUS RT-AC68U wi-fi router running with encryption. It's connected to a SurfBoard SB6141 cable modem with Charter Spectrum internet service via a Zyxel AV2000 Powerline adaptor. If you get good wi-fi ...
wait a minute or so and try the default router address (http://192.168.1.1) again. The sequence of new username and new password has to be completed again.