在我的angular 8应用程序中。当我尝试在终端窗口中运行ng服务时，出现一条错误消息：
An unhandled exception occurred: Object prototype may only be an Object or null: undefined
关于错误发生的位置，我没有更多的详细信息。下面是我的Package.json文件
{
"name": "ProjectDetails",
"version": "0.0.0",
"license": "MIT",
"scripts": {
"ng": "ng",
"start": "ng serve --extract-css",
"build": "ng build --extract-css",
"build:ssr": "npm run build -- --app=ssr --output-hashing=media",
"test": "ng test",
"lint": "ng lint",
"e2e": "ng e2e"
},
"private": true,
"dependencies": {
"@angular/animations": "^5.2.0",
"@angular/common": "^5.2.0",
"@angular/compiler": "^5.2.0",
"@angular/core": "^5.2.0",
"@angular/forms": "^5.2.0",
"@angular/platform-browser": "^5.2.0",
"@angular/platform-browser-dynamic": "^5.2.0",
"@angular/platform-server": "^5.2.0",
"@angular/router": "^5.2.0",
"@nguniversal/module-map-ngfactory-loader": "^5.0.0-beta.5",
"aspnet-prerendering": "^3.0.1",
"bootstrap": "^3.4.1",
"core-js": "^2.4.1",
"rxjs": "^5.5.6",
"tslib": "^1.10.0",
"zone.js": "~0.9.1"
},
"devDependencies": {
"@angular-devkit/build-angular": "^0.803.1",
"@angular/cli": "^8.3.1",
"@angular/compiler-cli": "^8.2.4",
"@angular/language-service": "^5.2.0",
"@types/jasmine": "~2.8.3",
"@types/jasminewd2": "~2.0.2",
"@types/node": "~6.0.60",
"codelyzer": "^5.0.1",
"jasmine-core": "~2.8.0",
"jasmine-spec-reporter": "~4.2.1",
"karma": "^4.3.0",
"karma-chrome-launcher": "~2.2.0",
"karma-coverage-istanbul-reporter": "^1.2.1",
"karma-jasmine": "~1.1.0",
"karma-jasmine-html-reporter": "^0.2.2",
"protractor": "^6.0.0",
"ts-node": "~4.1.0",
"tslint": "~5.9.1",
"typescript": "~2.5.3"
},
"optionalDependencies": {
"node-sass": "^4.9.0"
}
}
任何帮助将不胜感激。