Trying to display ClassDojo on TV Screen

Trying to display ClassDojo (a website we use at the school I work at) on the TV screen in one of the Layout regions. It will display the home screen then when I sign in to my ClassDojo account the screen goes blank. Why is this happening? Is it trying to protect my privacy? How can I get around this?

I’m not familiar with ClassDojo, but it is certainly possible that user created content you may have there needs to be shared publicly in order to display it in 3rd party applications, if it always require you to authenticate (log in) then it might not be best suited for digital signage.

Is there a way to embed some specific pages from it without the need to be logged in or does it always require you to be authenticated in order to see the resources?