Error: Schema validation failed with the following errors: Data path “” should NOT have additional properties(project)

Question

After migrating application from angular 5 to 6, on running ng serve the following errors pop up.

Schema validation failed with the following errors:

Answer 1

go to package.json and change the version of @angular-devkit/build-angular as follows:

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