title: mgt-login is not working as expected in sample example
body: <p>mgt-login was working and returning user displayname and profile photo. However it is showing this error message in console.</p>
  <p>This code worked as expected earlier.</p>
  <p><div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false">
  <div class="snippet-code">
  <pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;!DOCTYPE html&gt;
  &lt;html&gt;
      &lt;head&gt;
        &lt;script src="https://unpkg.com/@microsoft/mgt/dist/bundle/mgt-loader.js"&gt;&lt;/script&gt;    
     &lt;/head&gt;
    
     &lt;body&gt;
          &lt;title&gt;Hello World&lt;/title&gt;
           &lt;mgt-msal-provider client-id="[Client Id]"&gt;&lt;/mgt-msal-provider&gt;
           &lt;mgt-login&gt;&lt;/mgt-login&gt;
     &lt;/body&gt;
  &lt;/html&gt;</code></pre>
  </div>
  </div>
  </p>
  <p><a href="https://i.stack.imgur.com/cP2cG.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/cP2cG.jpg" alt="Error displayed in Console" /></a></p>