title: Schema validation failed with the following errors: Data path ".builders['app-shell']" should have required property 'class'
body: <pre><code>Schema validation failed with the following errors:
    Data path ".builders['app-shell']" should have required property 'class'.
  
  Schema validation failed with the following errors:
    Data path ".builders['app-shell']" should have required property 'class'.
  Error: Schema validation failed with the following errors:
    Data path ".builders['app-shell']" should have required property 'class'.
      at MergeMapSubscriber._registry.compile.pipe.operators_1.concatMap.validatorResult [as project] (D:\repo\beauty-velvettes-web\node_modules\@angular\cli\node_modules\@angular-devkit\core\src\workspace\workspace.js:210:42)
      at MergeMapSubscriber._tryNext (D:\repo\beauty-velvettes-web\node_modules\@angular\cli\node_modules\rxjs\internal\operators\mergeMap.js:65:27)
      at MergeMapSubscriber._next (D:\repo\beauty-velvettes-web\node_modules\@angular\cli\node_modules\rxjs\internal\operators\mergeMap.js:55:18)
      at MergeMapSubscriber.Subscriber.next (D:\repo\beauty-velvettes-web\node_modules\@angular\cli\node_modules\rxjs\internal\Subscriber.js:64:18)
      at MergeMapSubscriber.notifyNext (D:\repo\beauty-velvettes-web\node_modules\@angular\cli\node_modules\rxjs\internal\operators\mergeMap.js:84:26)
      at InnerSubscriber._next (D:\repo\beauty-velvettes-web\node_modules\@angular\cli\node_modules\rxjs\internal\InnerSubscriber.js:25:21)
      at InnerSubscriber.Subscriber.next (D:\repo\beauty-velvettes-web\node_modules\@angular\cli\node_modules\rxjs\internal\Subscriber.js:64:18)
      at MapSubscriber._next (D:\repo\beauty-velvettes-web\node_modules\@angular\cli\node_modules\rxjs\internal\operators\map.js:52:26)
      at MapSubscriber.Subscriber.next (D:\repo\beauty-velvettes-web\node_modules\@angular\cli\node_modules\rxjs\internal\Subscriber.js:64:18)
      at SwitchMapSubscriber.notifyNext (D:\repo\beauty-velvettes-web\node_modules\@angular\cli\node_modules\rxjs\internal\operators\switchMap.js:77:26)
  </code></pre>