我正在开发一个在Internet Explorer中无法使用的Angular 7应用程序（在其他浏览器中，一切正常。）错误信息： TypeError：您提供了一个无效的对象，该对象应在其中流。您可以提供一个Observable，Promise，Array或Iterable。 我已经进行了无数次尝试来解决该问题，但是还没有找到解决方案。
有人知道为什么吗？我为每一个小技巧感到高兴！非常感谢。
我对polyfills.ts作了以下附加导入：
import 'web-animations-js';
import 'zone.js/dist/zone';
import '@webcomponents/custom-elements';
import '@webcomponents/custom-elements/src/native-shim';
import 'intl';
我的package.json：
"dependencies": {
"@angular/animations": "^7.0.3",
"@angular/cdk": "^7.0.3",
"@angular/common": "^7.0.3",
"@angular/compiler": "^7.0.3",
"@angular/core": "^7.0.3",
"@angular/forms": "^7.0.3",
"@angular/http": "^7.0.3",
"@angular/material": "7.2.1",
"@angular/platform-browser": "^7.0.3",
"@angular/platform-browser-dynamic": "^7.0.3",
"@angular/router": "^7.0.3",
"@fortawesome/fontawesome-free": "^5.3.1",
"@ngrx/effects": "^6.0.1",
"@ngrx/entity": "^6.0.1",
"@ngrx/store": "^6.0.1",
"@ngrx/store-devtools": "^6.0.1",
"@ngx-translate/core": "9.1.1",
"@ngx-translate/http-loader": "^2.0.1",
"@syncfusion/ej2-ng-buttons": "^16.1.37",
"@syncfusion/ej2-ng-grids": "^16.1.44",
"@syncfusion/ej2-ng-popups": "^16.1.42",
"angular-calendar": "^0.25.2",
"angular-messages": "^1.7.7",
"classlist.js": "^1.1.20150312",
"core-js": "^2.4.1",
"font-awesome": "^4.7.0",
"global": "^4.3.2",
"lht-auth": "1.4.1",
"lht-bootstrap-npm": "1.0.7",
"ngrx-store-logger": "^0.2.2",
"ngx-bootstrap": "^3.0.1",
"ngx-contextmenu": "^5.0.1",
"ngx-cookie": "^1.0.1",
"ngx-cookie-service": "^1.0.10",
"ngx-device-detector": "1.3.4",
"node-sass": "^4.6.0",
"primeflex": "^1.0.0-rc.1",
"primeicons": "^1.0.0",
"primeng": "^7.0.5",
"rxjs": "^6.2.1",
"rxjs-compat": "6.3.3",
"web-animations-js": "^2.3.1",
"zone.js": "^0.8.26"
},