由于错误，无法执行（ng serve --open）项目。以下是我的 package.json 。请帮忙！！！！ 将angular升级到8后，错误开始出现。
{
"name": "mega-portal",
"version": "1.0.0",
"scripts": {
"ng": "ng",
"start": "ng serve",
"build": "ng build",
"test": "ng test",
"lint": "ng lint",
"e2e": "ng e2e"
},
"private": true,
"dependencies": {
"@angular/animations": "^8.2.2",
"@angular/cli": "^8.2.2",
"@angular/common": "^8.2.2",
"@angular/compiler": "^8.2.2",
"@angular/compiler-cli": "^8.2.2",
"@angular/core": "^8.2.2",
"@angular/forms": "^8.2.2",
"@angular/http": "^6.1.0",
"@angular/platform-browser": "^6.1.0",
"@angular/platform-browser-dynamic": "^6.1.0",
"@angular/router": "^8.2.2",
"@epicor/kinetic": "^3.1.11",
"@types/adal": "^1.0.29",
"@types/underscore": "^1.9.2",
"angular-fusioncharts": "^3.0.1",
"angular-highcharts": "^7.2.0",
"angular-mailto": "^0.1.0",
"bootstrap": "^4.3.1",
"chart.js": "^2.7.3",
"core-js": "^2.5.4",
"crypto": "^1.0.1",
"crypto-js": "^3.1.9-1",
"fs": "0.0.1-security",
"fusioncharts": "^3.13.4",
"highcharts": "^7.1.1",
"jstz": "^2.1.1",
"net": "^1.0.2",
"ngx-json-viewer": "^2.4.0",
"ngx-json-viewer-scrolling": "^2.3.1",
"ngx-pagination": "^4.0.0",
"os": "^0.1.1",
"rxjs": "^6.4.0",
"rxjs-compat": "^6.4.0",
"tls": "0.0.1",
"underscore": "^1.9.1",
"zone.js": "~0.8.26"
},
"devDependencies": {
"@angular-devkit/build-angular": "^0.803.20",
"@angular/animations": "^8.2.2",
"@angular/cli": "^8.2.2",
"@angular/common": "^8.2.2",
"@angular/compiler": "^8.2.2",
"@angular/compiler-cli": "^8.2.2",
"@angular/core": "^8.2.2",
"@angular/forms": "^8.2.2",
"@angular/language-service": "^6.1.0",
"@types/jasmine": "~2.8.8",
"@types/jasminewd2": "~2.0.3",
"@types/node": "~8.9.4",
"codelyzer": "~4.3.0",
"jasmine-core": "~2.99.1",
"jasmine-spec-reporter": "~4.2.1",
"karma": "^4.1.0",
"karma-chrome-launcher": "~2.2.0",
"karma-coverage-istanbul-reporter": "~2.0.1",
"karma-jasmine": "~1.1.2",
"karma-jasmine-html-reporter": "^0.2.2",
"protractor": "~5.4.0",
"ts-node": "~7.0.0",
"tslint": "~5.11.0",
"typescript": "3.5.3"
},
"browser": {
"http": false,
"https": false,
"net": false,
"path": false,
"stream": false,
"tls": false
}
}
我遇到的错误-
发生未处理的异常：对象原型只能是 对象或null：未定义（角度8）
感谢任何帮助！!!!