title: magento product detail pages are blank
body: <p>Facing an issue with <a href="https://biotone.com/massage-products/creme/advanced-therapy-massage-creme" rel="nofollow noreferrer">magento store product</a> detail page. Browser console is only showing error below. Nothing has been updated to the extension referenced below. Any direction to identify the issue would be appreciated.</p>
  
  <pre><code>Uncaught TypeError: Cannot read property 'getElements' of null
  at HTMLDocument.&lt;anonymous&gt; (scp_product_extension.js:519)
  at HTMLDocument.responder (prototype.js:5575)
  at fire (prototype.js:5734)
  at HTMLDocument._methodized [as fire] (prototype.js:438)
  at HTMLDocument.fireContentLoadedEvent (prototype.js:5820)
  </code></pre>
  
  <p>The exception.log shows </p>
  
  <pre><code>2016-12-20T14:21:52+00:00 ERR (3): 
  exception 'Mage_Core_Exception' with message 'Parse error reading getAccessToken 
  HTTP response!' in  var/www/vhosts/biotone.com/httpdocs/app/Mage.php:595
  </code></pre>