Angular Universal: Schema validation failed with the following errors: Data path "" should NOT have additional properties(index).

Bug Report or Feature Request (mark with an x)

- [x ] bug report -> please search issues before submitting
- [ ] feature request

Command (mark with an x)

- [ ] new
- [x ] build
- [x ] serve
- [ ] test
- [ ] e2e
- [ ] generate
- [ ] add
- [ ] update
- [ ] lint
- [ ] xi18n
- [ ] run
- [ ] config
- [ ] help
- [ ] version
- [ ] doc

Versions

Node v10.5.0 NPM v6.1.0

Angular CLI: 6.0.8 Node: 10.5.0 OS: win32 x64 Angular: 6.0.6 … animations, common, compiler, compiler-cli, core, forms … http, language-service, platform-browser … platform-browser-dynamic, router

Package Version

@angular-devkit/architect 0.6.8 @angular-devkit/build-angular 0.6.8 @angular-devkit/build-optimizer 0.6.8 @angular-devkit/core 0.6.8 @angular-devkit/schematics 0.6.8 @angular/cli 6.0.8 @angular/platform-server 6.1.4 @ngtools/webpack 6.0.8 @schematics/angular 0.6.8 @schematics/update 0.6.8 rxjs 6.2.1 typescript 2.7.2 webpack 4.8.3

Repro steps

ng serve or npm run build:ssr

The log given by the failure

Schema validation failed with the following errors: Data path “” should NOT have additional properties(index). npm ERR! code ELIFECYCLE

Desired functionality

No errors.

Mention any other details that might be useful

I am trying to implement Angular Universal, I have followed this article https://angular.io/guide/universal I did go through other articles with similar problems, all of them say to downgrade npm package versions to 0.6.3. I currently run the latest cli, hence opening this issue. Please let me know if additional details are needed

[pradeepverse]

Create a fresh ng project using latest angular-cli and compare angular.json with your project’s angular.json. You might be able to figure our the issue.

[scorpion-3]

after updating to the latest version it got fixed. hence closing this issue. Thanks a lot for the help!