Schema validation failed with the following errors: Data path “.builders[‘app-shell’]” should have required property ‘class’

December 10, 2022 by Tarik

Try to update the package.json file so that "@angular-devkit/build-angular": "^0.800.1" reads "@angular-devkit/build-angular": "^0.12.4"

Then run npm install in the command line.

Reference: https://stackoverflow.com/a/56537342