It seems to be a problem with path to the css file. You can fix it if you go to “wp-content/plugins/official-treehouse-badges-widgets-and-shortcodes” and edit the file “wptreehouse-badges.php”
You should go to lines 237, 244 and 245 and change the path to look like this:
`wp_enqueue_style( ‘wptreehouse_badges_backend_css’, plugins_url( ‘official-treehouse-badges-widgets-and-shortcodes/wptreehouse-badges.css’ ) );
Victor
