title: 404 error for Google Tag Manager
body: <p>Google Tag Manager told me to put this underneath the opening <code>body</code> tag.</p>
  
  <pre class="lang-html prettyprint-override"><code>&lt;!-- Google Tag Manager --&gt;
  &lt;noscript&gt;&lt;iframe src="//www.googletagmanager.com/ns.html?id=GTM-XXXXXX"
  height="0" width="0" style="display:none;visibility:hidden"&gt;&lt;/iframe&gt;&lt;/noscript&gt;
  &lt;script&gt;(function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':
  new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],
  j=d.createElement(s),dl=l!='dataLayer'?'&amp;l='+l:'';j.async=true;j.src=
  '//www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);
  })(window,document,'script','dataLayer','GTM-XXXXXX');&lt;/script&gt;
  &lt;!-- End Google Tag Manager --&gt;
  </code></pre>
  
  <p>Now I'm getting this 404 not found for GET:</p>
  
  <pre><code>GET http://www.googletagmanager.com/gtm.js?id=GTM-XXXXXX
  </code></pre>
  
  <p>I implemented the code last night. Does this just take time or is this something that needs to be fixed? If the latter, how would I fix it?</p>