I have only recently been able to try the solution you provided, but it unfortunately does not work. If I add the widget or shortcode from the plugin you said to use, it does not work. If I hit “preview page” from the page editor, it works no problem. However, when published, it does not work properly. What I discovered is that the plugin only shows images when using a direct URL to go to the page (ie. http://www.mywebsite.com/instagram) but will not work if I go to (www.mywebsite.com) and then click “instagram” to end up at (www.mywebsite.com/#/instagram). You can play around with that and see what I am talking about using the link provided in the private content section. If users can only see the instagram feed when using a direct link and are unable to use the theme as intended, it would be quite the waste.