title: facebook page plugin not displayed on wix.com website
body: <p>I am trying to add an iframe pointing to my facebook feed on a wix.com website. 
  Unfortunately, it does not display anything. </p>
  
  <p>On wixsite, I added an html iframe control and pasted code generated by this site : <a href="https://developers.facebook.com/docs/plugins/page-plugin/" rel="nofollow noreferrer">https://developers.facebook.com/docs/plugins/page-plugin/</a></p>
  
  <pre><code>&lt;iframe src="https://www.facebook.com/plugins/page.php?href=https%3A%2F%2Fwww.facebook.com%2Fsentiersdenfance%2F&amp;tabs=timeline&amp;width=340&amp;height=500&amp;small_header=false&amp;adapt_container_width=true&amp;hide_cover=false&amp;show_facepile=true&amp;appId" width="340" height="500" style="border:none;overflow:hidden" scrolling="no" frameborder="0" allowTransparency="true" allow="encrypted-media"&gt;&lt;/iframe&gt;
  </code></pre>
  
  <p>but it does not display anything on my wix.com site. </p>
  
  <p>I tried this iframe also here but it is not display although : <a href="https://jsbin.com/walewaxayi/edit?html,output" rel="nofollow noreferrer">https://jsbin.com/walewaxayi/edit?html,output</a></p>
  
  <p>Do you see what could I forgotten ?</p>