When you're installing packages in GUI mode, the developer training courses ad (developer_eng.png) has a bad url. The URL on the ad is: www.redhat.com/training/developers/courses that's a 404, but poking around on the site, makes me think it should be: www.redhat.com/training/developer/courses
Thanks I'll have marketing check this out.
The web site will redirect this link to the appropriate one. Thanks for catching this!