title: rxjs/scheduler/VirtualTimeScheduler.js 404 Not Found
body: <p>I've upgraded my app from Angular 5 to 6 following <a href="https://update.angular.io" rel="nofollow noreferrer">https://update.angular.io</a> tutorial. The app doesn't load producing errors:</p>
  
  <pre><code>zone.js:1050 GET http://localhost:9000/node_modules/rxjs/scheduler/VirtualTimeScheduler.js 404 (Not Found)
  zone.js:1050 GET http://localhost:9000/node_modules/rxjs/testing/TestScheduler.js 404 (Not Found)
  zone.js:1050 GET http://localhost:9000/node_modules/rxjs/scheduler/AsyncScheduler.js 404 (Not Found)
  zone.js:1050 GET http://localhost:9000/node_modules/rxjs/scheduler/AsyncAction.js 404 (Not Found)
  </code></pre>
  
  <p>package.json: <a href="https://pastebin.com/Qwhi63VR" rel="nofollow noreferrer">https://pastebin.com/Qwhi63VR</a></p>
  
  <p>systemjs.config.js: <a href="https://pastebin.com/3U7Qih1g" rel="nofollow noreferrer">https://pastebin.com/3U7Qih1g</a></p>
  
  <p>Any ideas what could be wrong here and how to fix it?</p>