title: Error: In this configuration Angular requires Zone.js
body: <p>I'm trying to run a Grails 2.3.9 application that use inside Angular 5. For this i create a new Grails project and a new angular project with <em>angular-cli</em> (<code>ng new app</code>). After this i made these steps.</p>
  
  <ol>
  <li><p>Build the angular project to get the resources bundles: <code>ng build --prod</code></p></li>
  <li><p>Copy the already created dist folder's files and paste it in the Grails project in <em>web-app/js/lib</em></p></li>
  <li><p>In grails create a new Controller and view to serve the index for angular</p></li>
  <li><p>In the <em>index.gsp</em> i put the content of the <em>index.html</em> that was created in angular build and replace the src of the scripts with Grails create link statements pointing to js/lib/... to be able for Grails to serve correctly those files</p></li>
  </ol>
  
  <p>When I run my Grails app and go to the specified address for angular to run I get a blank page and in the console this error:</p>
  
  <pre><code>Error: In this configuration Angular requires Zone.js
  </code></pre>
  
  <p>I try to copy the dist folder in an Apache server and everything works fine, so, i don't think that the problem is related to the generated files after <code>ng build --prod</code>.</p>