Errors: Data path “.builders['app-shell']” should have required property 'class'

Question

I am getting this error while running my application. Here are the details of my application.

Angular CLI: 7.3.3 
Node: 10.15.1 
Angular: 7.2.7 
@angular-de         


        

Answer 1

On my side it was package

@angular-devkit/build-angular

and

@angular-devkit/build-ng-packagr

was not the same version, Updating build-ng-packagr to same version as build-angular fixed my problem.