For me I had a power bank plugged via USB in so I ***''turned off my Xbox by the plug switch'' ***so there’s absolute no power, I ***''took out the power bank''*** then ***''I could sync my Xbox! [br]
''***I didn’t know power banks could prevent the Bluetooth button from having an affect but to be honest I’m pretty sure it was making the power bank blink like it was trying to connect to something Bluetooth lol anyways hope this helps!