Customizr Theme In-Page Widgets Problem

I am using the Customzr theme and am trying to add some widgets(tag clouds) into the content area of pages. I have followed this guide in trying to get it to work, but nothing seems to show up. On the contrary, the widgets work in sidebars.

http://www.wpbeginner.com/plugins/how-to-add-wordpress-widgets-in-post-and-page-content/comment-page-1/#comment-306850

Does anyone know what could be the problem? I even install a plugin to get the precise IDs for widgets.