Hapara have alerted us to a problem with their Teacher Dashboard Chrome App. If you try to access TD using the App you'll receive a message saying,
"`Good news! Your school has purchased Teacher Dashboard...
... but it is not quite ready to go just yet..."
Which is obviously not correct ... :)
There's a simple workaround that I'm sure most of you know: access TD using one of the URLs:
I'll provide an update as further information comes to hand.