Unhandled Promise rejection by Zone.js Error in Angular7

[jaykhatriwebdesigner]

Error: Unhandled Promise rejection: Cannot redefine property: prototype ; Zone: ; Task: Promise.then ; Value: TypeError: Cannot redefine property: prototype at defineProperty () at _tryDefineProperty (zone-evergreen.js:2230) at Function.Object.defineProperty (zone-evergreen.js:2180) at Extender.Set (angular-maps.js:2784) at Extender.Extend (angular-maps.js:2763) at MixinMapLabelWithOverlayView$1 (angular-maps.js:5008) at angular-maps.js:14557 at ZoneDelegate.invoke (zone-evergreen.js:359) at Zone.run (zone-evergreen.js:124) at zone-evergreen.js:855 TypeError: Cannot redefine property: prototype at defineProperty () at _tryDefineProperty (http://localhost:4200/polyfills.js:8308:16) at Function.Object.defineProperty (http://localhost:4200/polyfills.js:8258:16) at Extender.Set (http://localhost:4200/vendor.js:165005:16) at Extender.Extend (http://localhost:4200/vendor.js:164984:14) at MixinMapLabelWithOverlayView$1 (http://localhost:4200/vendor.js:167229:10) at http://localhost:4200/vendor.js:176778:13 at ZoneDelegate.invoke (http://localhost:4200/polyfills.js:6437:26) at Zone.run (http://localhost:4200/polyfills.js:6202:43) at http://localhost:4200/polyfills.js:6933:36

Here is my package which i am using

{ "name": "frontend", "version": "0.0.0", "scripts": { "ng": "ng", "start": "ng serve", "build": "ng build", "test": "ng test", "lint": "ng lint", "e2e": "ng e2e" }, "private": true, "dependencies": { "@angular/animations": "~8.2.7", "@angular/cdk": "~8.2.3", "@angular/common": "~8.2.7", "@angular/compiler": "~8.2.7", "@angular/core": "~8.2.7", "@angular/forms": "~8.2.7", "@angular/material": "^8.2.3", "@angular/platform-browser": "~8.2.7", "@angular/platform-browser-dynamic": "~8.2.7", "@angular/router": "~8.2.7", "@ng-bootstrap/ng-bootstrap": "^5.1.1", "core-js": "2.5.5", "zone.js": "~0.9.1", "bingmaps": "2.0.3", "angular-maps": "^6.0.3", "hammerjs": "^2.0.8", "jquery": "^3.4.1", "rxjs": "~6.4.0", "tslib": "^1.10.0" }, "devDependencies": { "@angular-devkit/build-angular": "~0.803.5", "@angular/cli": "~8.3.5", "@angular/compiler-cli": "~8.2.7", "@angular/language-service": "~8.2.7", "@types/node": "~8.9.4", "@types/jasmine": "~3.3.8", "@types/jasminewd2": "~2.0.3", "codelyzer": "^5.0.0", "jasmine-core": "~3.4.0", "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": "~2.0.1", "karma-jasmine-html-reporter": "^1.4.0", "protractor": "~5.4.0", "ts-node": "~7.0.0", "tslint": "~5.15.0", "typescript": "~3.5.3" } }

[thor-schueler]

Seems related to #110