I know there's a thread about this somewhere but I can't find it.
It started on my Aura a few days ago, trying to connect to iPlayer.
The first time I fixed it by rebooting.
The second time I returned to the home screen and tried again, and it worked.
The third time I stabbed repeatedly at the 'Try again' button and that kicked it into life.
It occurs to me to wonder if it's relevant that it started when the temperature dropped, and that some of the ethernet to the Aura runs outside the house.
[attachment=102958,2328]