Google demo notebook refuses to display authentication

Hi,

Not sure if this project is still alive, but here's my question:

I cannot get the Google demo notebook to display anything when I press the "Sign In" button.

From FF I see

Load denied by X-Frame-Options: “SAMEORIGIN” from “https://accounts.google.com/o/oauth2/v2/auth?response_type=t…iframe%2Ctbbyvzeiqn&include_granted_scopes=false&prompt=none”, site does not permit cross-origin framing from “moz-nullprincipal:{201129b3-f530-4d01-8784-3c0e9960e89b}”.

From Chrome I see

Refused to display 'https://accounts.google.com/o/oauth2/v2/auth?response_type=token&redirect_uri=http%3A%2F%2Flocalhost%3A8888%2Fcallback%2F&client_id=145442607022-m3kfq4a6daa6bnifmc5cb0eulpa4ig3o.apps.googleusercontent.com&scope=profile%20openid%20https%3A%2F%2Fwww.googleapis.com%2Fauth%2Fdrive%20https%3A%2F%2Fwww.googleapis.com%2Fauth%2Fspreadsheets&access_type=online&state=google%2Ciframe%2Canlmlqcrjj&include_granted_scopes=false&prompt=none' in a frame because it set 'X-Frame-Options' to 'sameorigin'.

In both browsers I'm allowing popups.

Is there a configuration change I can make so that this works?

Thanks!