title: Cannot read property 'setProperty' of undefined fxFlex issue with ng-container Angular 9 Flex Layout
body: <pre><code>&lt;div [fxLayout]="fields.layoutConfig.layoutDirection + ' wrap'" fxLayout.xs="column"
      [fxLayoutGap]="fields.layoutConfig.fxLayoutGap"&gt;
  
      &lt;ng-container [fxFlex]="50" *ngFor="let field of fields.componentConfig;" reactiveField [field]="field" [group]="form"&gt;
      &lt;/ng-container&gt;
  
  &lt;/div&gt;
  </code></pre>
  
  <p>Trying to use the [fxFlex]="50" inside the container getting an error <code>Cannot read property 'setProperty' of undefined</code></p>
  
  <p><a href="https://i.stack.imgur.com/NGHBa.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/NGHBa.png" alt="enter image description here"></a></p>
  
  <p>Some of the issues <a href="https://github.com/angular/flex-layout/issues/1046" rel="nofollow noreferrer">https://github.com/angular/flex-layout/issues/1046</a>
  <a href="https://github.com/angular/flex-layout/issues/381" rel="nofollow noreferrer">https://github.com/angular/flex-layout/issues/381</a></p>