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

I also faced this issue and struggled hours to solve it, I have tried all of the above options but nothing solved my problem. This issue occurs due to version mismatch of angular/cli and angular-devkit, so I did the following :

1. Manually changed version of files:

   @angular-devkit/build-angular": "^0.13.9",

   @angular/cli": "~7.0.3", //This is for Angular7, for Angular8 : 0.803.23

2. Deleted package-lock.json

3. Executed : npm install

It solved my problem.