Glitch on displaying a loadable url in Master. The content page flicks when it gets display (eg: page is viewable then it disappears).

Error console:

Error: TypeError: Y.YUI2 is undefined

Source File: http://test.local/master/lib/javascript.php/1347345665/lib/javascript-static.js

Line: 22

To replicate:

1. create URL resource to a course.
2. On external URL field type http://www.cnn.com
3. For the Display setting, choose Embed.
4. Click 'Save and display'

The page will load the page for few seconds then disappear.