found an issue when run script 'ng serve' about angular-pro-sidebar HOT 3 OPEN

thank you so much , It works .

from angular-pro-sidebar.

C:\work\projects\angular-pro-sidebar-gh-pages>ng serve
Your global Angular CLI version (8.3.24) is greater than your local
version (7.1.2). The local Angular CLI version is used.

To disable this warning use "ng config -g cli.warnings.versionMismatch false".
**Schema validation failed with the following errors:
Data path ".builders['app-shell']" should have required property 'class'.
Error: Schema validation failed with the following errors:
Data path ".builders['app-shell']" should have required property 'class'.
at MergeMapSubscriber.project (C:\work\projects\angular-pro-sidebar-gh-pages\node_modules@angular-devkit\core\src\workspace\workspace.js:215:42)
at MergeMapSubscriber._tryNext (C:\work\projects\angular-pro-sidebar-gh-pages\node_modules\rxjs\internal\operators\mergeMap.js:69:27)
at MergeMapSubscriber._next (C:\work\projects\angular-pro-sidebar-gh-pages\node_modules\rxjs\internal\operators\mergeMap.js:59:18)
at MergeMapSubscriber.Subscriber.next (C:\work\projects\angular-pro-sidebar-gh-pages\node_modules\rxjs\internal\Subscriber.js:67:18)
at MergeMapSubscriber.notifyNext (C:\work\projects\angular-pro-sidebar-gh-pages\node_modules\rxjs\internal\operators\mergeMap.js:92:26)
at InnerSubscriber._next (C:\work\projects\angular-pro-sidebar-gh-pages\node_modules\rxjs\internal\InnerSubscriber.js:28:21)
at InnerSubscriber.Subscriber.next (C:\work\projects\angular-pro-sidebar-gh-pages\node_modules\rxjs\internal\Subscriber.js:67:18)
at MapSubscriber._next (C:\work\projects\angular-pro-sidebar-gh-pages\node_modules\rxjs\internal\operators\map.js:55:26)
at MapSubscriber.Subscriber.next (C:\work\projects\angular-pro-sidebar-gh-pages\node_modules\rxjs\internal\Subscriber.js:67:18)
at SwitchMapSubscriber.notifyNext (C:\work\projects\angular-pro-sidebar-gh-pages\node_modules\rxjs\internal\operators\switchMap.js:86:26)

from angular-pro-sidebar.

Try re-compiling sass files.

npm rebuild node-sass --force

if doesn't work

npm install node-sass`

And try again. =)

from angular-pro-sidebar.