no extension Field 'browser' doesn't contain a valid alias configuration I am getting this error when building angular 5 application. "dependencies": { "@angular/animations": "^5.2.4", "@angular/cdk": "^5.2.0", "@angular/common": "^5.2.4", "@angular/compiler": "^5.2.4", "@angular/core": "^5.2.4", "@angular/forms": "^5.2.4", "@angular/http": "^5.2.4", "@angular/material": "5.2.0", "@angular/platform-browser": "^5.2.4", "@angular/platform-browser-dynamic": "^5.2.4", "@angular/router": "^5.2.4", "angular-bootstrap-md": "^5.1.2", "core-js": "^2.5.3", "font-awesome": "^4.7.0", "hammerjs": "^2.0.8", "ng-snotify": "^4.2.0", "ngx-loading-mask": "^0.4.0", "primeng": "^5.0.2", "rxjs": "^5.5.6", "zone.js": "^0.8.20" },