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._registry.compile.pipe.operators_1.concatMap.validatorResult [as project] (C:\Projects\Survey Managment\Applications\SurveyWeb\ClientApp\node_modules\@angular-devkit\core\src\workspace\workspace.js:215:42)
at MergeMapSubscriber._tryNext (C:\Projects\Survey Managment\Applications\SurveyWeb\ClientApp\node_modules\rxjs\internal\operators\mergeMap.js:69:27)
at MergeMapSubscriber._next (C:\Projects\Survey Managment\Applications\SurveyWeb\ClientApp\node_modules\rxjs\internal\operators\mergeMap.js:59:18)
at MergeMapSubscriber.Subscriber.next (C:\Projects\Survey Managment\Applications\SurveyWeb\ClientApp\node_modules\rxjs\internal\Subscriber.js:67:18)
at MergeMapSubscriber.notifyNext (C:\Projects\Survey Managment\Applications\SurveyWeb\ClientApp\node_modules\rxjs\internal\operators\mergeMap.js:92:26)
at InnerSubscriber._next (C:\Projects\Survey Managment\Applications\SurveyWeb\ClientApp\node_modules\rxjs\internal\InnerSubscriber.js:28:21)
at InnerSubscriber.Subscriber.next (C:\Projects\Survey Managment\Applications\SurveyWeb\ClientApp\node_modules\rxjs\internal\Subscriber.js:67:18)
at MapSubscriber._next (C:\Projects\Survey Managment\Applications\SurveyWeb\ClientApp\node_modules\rxjs\internal\operators\map.js:55:26)
at MapSubscriber.Subscriber.next (C:\Projects\Survey Managment\Applications\SurveyWeb\ClientApp\node_modules\rxjs\internal\Subscriber.js:67:18)
at SwitchMapSubscriber.notifyNext (C:\Projects\Survey Managment\Applications\SurveyWeb\ClientApp\node_modules\rxjs\internal\operators\switchMap.js:86:26)
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._registry.compile.pipe.operators_1.concatMap.validatorResult [as project] (C:\Projects\Survey Managment\Applications\SurveyWeb\ClientApp\node_modules\@angular-devkit\core\src\workspace\workspace.js:215:42) at MergeMapSubscriber._tryNext (C:\Projects\Survey Managment\Applications\SurveyWeb\ClientApp\node_modules\rxjs\internal\operators\mergeMap.js:69:27) at MergeMapSubscriber._next (C:\Projects\Survey Managment\Applications\SurveyWeb\ClientApp\node_modules\rxjs\internal\operators\mergeMap.js:59:18) at MergeMapSubscriber.Subscriber.next (C:\Projects\Survey Managment\Applications\SurveyWeb\ClientApp\node_modules\rxjs\internal\Subscriber.js:67:18) at MergeMapSubscriber.notifyNext (C:\Projects\Survey Managment\Applications\SurveyWeb\ClientApp\node_modules\rxjs\internal\operators\mergeMap.js:92:26) at InnerSubscriber._next (C:\Projects\Survey Managment\Applications\SurveyWeb\ClientApp\node_modules\rxjs\internal\InnerSubscriber.js:28:21) at InnerSubscriber.Subscriber.next (C:\Projects\Survey Managment\Applications\SurveyWeb\ClientApp\node_modules\rxjs\internal\Subscriber.js:67:18) at MapSubscriber._next (C:\Projects\Survey Managment\Applications\SurveyWeb\ClientApp\node_modules\rxjs\internal\operators\map.js:55:26) at MapSubscriber.Subscriber.next (C:\Projects\Survey Managment\Applications\SurveyWeb\ClientApp\node_modules\rxjs\internal\Subscriber.js:67:18) at SwitchMapSubscriber.notifyNext (C:\Projects\Survey Managment\Applications\SurveyWeb\ClientApp\node_modules\rxjs\internal\operators\switchMap.js:86:26)
what is this issue? my package.jon file is { "name": "SurveyWeb", "version": "0.0.0", "license": "MIT", "scripts": { "ng": "ng", "start": "ng serve --live-reload true", "build": "ng build", "build:ssr": "npm run build -- --app=ssr --output-hashing=media", "test": "ng test", "lint": "ng lint", "e2e": "ng e2e" }, "private": true, "dependencies": { "@agm/core": "^1.0.0-beta.3", "@angular/animations": "^7.2.2", "@angular/cdk": "^7.3.0", "@angular/common": "^7.2.2", "@angular/compiler": "^7.2.2", "@angular/core": "^7.2.2", "@angular/forms": "^7.2.2", "@angular/http": "^7.2.2", "@angular/platform-browser": "^7.2.2", "@angular/platform-browser-dynamic": "^7.2.2", "@angular/router": "^7.2.2", "@auth0/angular-jwt": "^3.0.0", "ag-grid-angular": "^20.0.0", "ag-grid-community": "^20.0.0", "bootstrap": "^4.3.1", "chart.js": "^2.7.3", "chart.piecelabel.js": "^0.15.0", "classlist.js": "^1.1.20150312", "core-js": "^2.6.3", "crypto-js": "^3.1.9-1", "exceljs": "^1.7.0", "file-saver": "^2.0.0", "font-awesome": "^4.7.0", "jquery": "^3.4.0", "linq-es5": "^1.11.14", "ng-simple-slideshow": "^1.2.9", "ng2-charts": "^1.6.0", "ngx-bootstrap": "^3.2.0", "ngx-ckeditor": "^0.4.0", "ngx-powerbi": "^2.0.0", "ngx-toastr": "^9.1.1", "popper.js": "^1.14.6", "powerbi-client": "2.7.1", "primeicons": "^2.0.0", "rxjs": "^6.0.0", "rxjs-compat": "^6.3.3", "web-animations-js": "^2.3.1", "xlsx": "^0.14.1", "zone.js": "^0.8.29" }, "devDependencies": { "@angular-devkit/build-angular": "^0.900.3", "@angular/cli": "^7.2.4", "@angular/compiler-cli": "^9.0.2", "@angular/language-service": "^7.2.2", "@types/jasmine": "~3.3.8", "@types/jasminewd2": "~2.0.3", "@types/node": "~10.12.19", "codelyzer": "~4.5.0", "jasmine-core": "~3.3.0", "jasmine-spec-reporter": "~4.2.1", "karma": "^4.1.0", "karma-chrome-launcher": "~2.2.0", "karma-coverage-istanbul-reporter": "~2.0.0", "karma-jasmine": "~2.0.1", "karma-jasmine-html-reporter": "^1.4.0", "protractor": "^5.4.2", "ts-node": "~8.0.2", "tslint": "~5.12.1", "typescript": "~3.2.4" } }