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

Try update the package.json file from

  "@angular-devkit/build-angular": "^0.800.1" 

to

  "@angular-devkit/build-angular": "^0.12.4"

Then run npm install in the command line.

Answer 2

In your package.json change the devkit builder.

"@angular-devkit/build-angular": "^0.800.1",

to

"@angular-devkit/build-angular": "^0.10.0",

it works for me.
good luck.

Answer 3

Everyone is focusing on downgrading @angular-devkit/build-angular version to X, or upgrading @angular/cli version to Y or latest.

However, Please do not blindly suggest an X or Y or latest as answers. (Though usually, downgrading devkit should be better because upgrading CLI is a breaking change)

The correct version to choose, always depends on your Angular (angular-cli) version.

Angular CLI v8.3.19 -> 0.803.19
Angular CLI v8.3.17 -> 0.803.17
Angular CLI v7.3.8 -> 0.13.8
Angular CLI v6-lts -> 0.8.9

For other specific versions, visit: https://github.com/angular/angular-cli/tags. Find your CLI version, and in some tags, they do mention the corresponding versions for @angular-devkit/** packages.

Note: If you want to upgrade your CLI version, you should first consider upgrading to latest of your major version, do not simply jump to the next major version.

Answer 4

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.

Answer 5

I changed @angular-devkit/build-angular": "0.9.0.1" to @angular-devkit/build-angular": "0.13.4" and it worked.

Answer 6

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.