I searched for other answers but mine seems the simplest!
My web builder lets me insert Javascript, HTML or CSS snippets into the <head> and <body> source code. It seems these snippets affect all website pages.
I inserted AddThis 'inline share buttons' within the <body>:
<script type="text/javascript" src="//s7.addthis.com/js/300/addthis_widget.js#pubid=ra-5ebdd74910cfe8a0"></script>
For activating the buttons, I added the next code in a single web page (drag-and-drop html code tool):
<div class="addthis_inline_share_toolbox_xa65"></div>
But the share buttons are not shown on that page: http://builder.ferozo.com/reparando-todo/#!/-testing/
I've tried adding both code snippets together into the same web page but no results. It doesn't seem to be a problem related to browsers blocking an unsafe widget due to a lack of a SSL Certificate.
Any idea of what could be the problem?