无法读取null angular 2的属性getSourceFile

Question

我开始学习angular2。我已经创建了启动应用程序并手动删除了一些组件然后它开始给出这个错误我如何解决这个错误
我没有确认此错误是由于删除组件或由于其他原因造成的。

我的package.json文件包含所有包装

{
"name": "my-app",
"version": "0.0.0",
  "license": "MIT",
"scripts": {
"ng": "ng",
"start": "ng serve",
"build": "ng build",
"test": "ng test",
"lint": "ng lint",
"e2e": "ng e2e"
},
"private": true,
"dependencies": {
"@angular/animations": "^4.2.4",
"@angular/common": "^4.2.4",
"@angular/compiler": "^4.2.4",
"@angular/core": "^4.2.4",
"@angular/forms": "^4.2.4",
"@angular/http": "^4.2.4",
"@angular/platform-browser": "^4.2.4",
"@angular/platform-browser-dynamic": "^4.2.4",
"@angular/router": "^4.2.4",
"bootstrap": "^3.3.7",
"core-js": "^2.4.1",
"ngx-bootstrap": "^1.9.3",
"rxjs": "^5.4.2",
"zone.js": "^0.8.14"
 },
 "devDependencies": {
"@angular/cli": "1.4.5",
"@angular/compiler-cli": "^4.2.4",
"@angular/language-service": "^4.2.4",
"@types/jasmine": "~2.5.53",
"@types/jasminewd2": "~2.0.2",
"@types/node": "~6.0.60",
"codelyzer": "~3.2.0",
"jasmine-core": "~2.6.2",
"jasmine-spec-reporter": "~4.1.0",
"karma": "~1.7.0",
"karma-chrome-launcher": "~2.1.1",
"karma-cli": "~1.0.1",
"karma-coverage-istanbul-reporter": "^1.2.1",
"karma-jasmine": "~1.1.0",
"karma-jasmine-html-reporter": "^0.2.2",
"protractor": "~5.1.2",
"ts-node": "~3.2.0",
"tslint": "~5.7.0",
"typescript": "~2.3.3"
}
}

Answer 1

重新启动我的ng服务器解决了我的问题