Actually, I came back to this topic to look at the method again, because I've encountered the same problem with another purchased motor + hub.
So basically I've purchased once again single hub and one motor and once again motor does not move at all, despite the fact that I am testing it on exact same project I've created in Powered Up for previous hub and motors (and over there everything works fine).
Regarding this:
unfortunately this does not work for me.
So here's what I did exactly this time:
1. I added batteries to the hub (4 ports, screws at the bottom version).
2. Connected motor (angular large) to port A.
3. Opened Powered Up app.
4. Opened my project that worked previously without issues with another same version of hub and other 3 same angular large motors.
5. Pressed green button on hub to start connection.
6. The hub connected and immediately update automatically started. There was a bar with 0 to 100% percentage going on screen.
7. Update finished normally. But still the motor doesn't rotate at all.