title: AngularJS: How to debug the 'App Already Bootstrapped with this Element' error
body: <p>In my AngularJS app I'm getting the follwing error when loading my site:</p>
  
  <pre><code>Uncaught Error: [ng:btstrpd] App Already Bootstrapped with this Element '&lt;html lang="en" ng-app="app" class="ng-scope"&gt;'
  </code></pre>
  
  <p>I have <code>ng-app</code> only set once (in <code>html</code> element in _Layout.cshtml (ASP.NET MVC)) and I don't use <code>angular.bootstrap</code> so the issue mentioned <a href="http://docs.angularjs.org/error/ng%3abtstrpd?p0=%3Chtml%20lang=%22en%22%20ng-app=%22app%22%20class=%22ng-scope%22%3E" rel="nofollow">here</a> should not apply. How can debug the issue (using F12, Firebug, Chrome...)?</p>