I try to add an item to a widget, which I created using the beta underground weather binding through paper UI. In order to reduce redundancy, I did not add the item to my *.items file in the Eclipse SmartHome Designer. The item shows up correctly in the Basic UI.
Just checking, but although your template looks correct, there’s a quote missing above. Are you sure it’s there?
Hit F12 in Chrome to check the Console, there should be an error message there.
There is indeed a parsing error. You can click on the link (http://errors.angularjs.org/…) and it will lead you to a page displaying the entire error message.
I’m seeing “weatherunderground” which is not in the template you posted. Maybe this error comes from a another template on the dashboard? Try creating a new empty dashboard and adding your template there.