title: Error: Already loaded patch: ZoneAwarePromise
body: <p>We try to make server side render build for Angular 5 project, then it shows this error. Zone js is loaded on my <code>polyfills.ts</code> , What the problem how to fix it.</p>
  
  <p>And i observe same Zone code in twice in mys <code>server.js</code> file, thanks</p>
  
  <pre><code>Error: Already loaded patch: ZoneAwarePromise
      at E:\ecap3\ecap3-webclient-selectnetwork\dist\server.js:628850:6
      at FUNCTION (E:\ecap3\ecap3-webclient-selectnetwork\dist\server.js:628213:10)
      at Object.&lt;anonymous&gt; (E:\ecap3\ecap3-webclient-selectnetwork\dist\server.js:628216:2)
      at __webpack_require__ (E:\ecap3\ecap3-webclient-selectnetwork\dist\server.js:372510:30)
  </code></pre>