Ошибки при запуске внешнего интерфейса в коде Visual Studio проекта angular

Я получил эту ошибку, когда просто загрузил и npm / установил / запустил этот проект на основе angular. https://github.com/OpenClassrooms-Student-Center/dwj-projet6

Инструкции :

• Клонировать проект
• Выполнить установку npm
• Выполните npm start.
• Выполнение API на http: // localhost: 3000

Ошибки

ng serve Your global Angular CLI version (11.2.6) is greater than your local version (7.0.7). 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:\Users\Phil\Desktop\Beta\dwj-projet6\node_modules\@angular-devkit\core\src\workspace\workspace.js:215:42) at MergeMapSubscriber._tryNext (C:\Users\Phil\Desktop\Beta\dwj-projet6\node_modules\rxjs\internal\operators\mergeMap.js:69:27) at MergeMapSubscriber._next (C:\Users\Phil\Desktop\Beta\dwj-projet6\node_modules\rxjs\internal\operators\mergeMap.js:59:18) at MergeMapSubscriber.Subscriber.next (C:\Users\Phil\Desktop\Beta\dwj-projet6\node_modules\rxjs\internal\Subscriber.js:67:18) at MergeMapSubscriber.notifyNext (C:\Users\Phil\Desktop\Beta\dwj-projet6\node_modules\rxjs\internal\operators\mergeMap.js:92:26) at InnerSubscriber._next (C:\Users\Phil\Desktop\Beta\dwj-projet6\node_modules\rxjs\internal\InnerSubscriber.js:28:21) at InnerSubscriber.Subscriber.next (C:\Users\Phil\Desktop\Beta\dwj-projet6\node_modules\rxjs\internal\Subscriber.js:67:18) at MapSubscriber._next (C:\Users\Phil\Desktop\Beta\dwj-projet6\node_modules\rxjs\internal\operators\map.js:55:26) at MapSubscriber.Subscriber.next (C:\Users\Phil\Desktop\Beta\dwj-projet6\node_modules\rxjs\internal\Subscriber.js:67:18) at SwitchMapSubscriber.notifyNext (C:\Users\Phil\Desktop\Beta\dwj-projet6\node_modules\rxjs\internal\operators\switchMap.js:86:26)

Спасибо