title: Errors: Data path ".builders['app-shell']" should have required property 'class'
body: <p>I am getting this error while running my application. Here are the details of my application. </p>
  
  <pre><code>Angular CLI: 7.3.3 
  Node: 10.15.1 
  Angular: 7.2.7 
  @angular-devkit/architect -0.13.3 
  @angular-devkit/build-angular- 0.800.1 
  @angular-devkit/build-optimizer - 0.800.1 
  @angular-devkit/build-webpack - 0.800.1 
  @angular-devkit/core -7.3.3 
  @angular-devkit/schematics -7.3.3 
  @angular/cli -7.3.3 
  @ngtools/webpack -8.0.1 
  @schematics/angular -7.3.3 
  @schematics/update 0.13.3 
  rxjs 6.3.3 
  typescript 3.2.4 
  webpack 4.30.0
  </code></pre>
  
  <p>I have already tried cache clean.</p>