HTTP Errror responses are not reaching restangular error Interceptor

[sushmavy]

I need help in setting error interceptor right.
this is my error interceptor.

this is the actual error thats displayed in red colour font is

HTTP401: DENIED - The requested resource requires user authentication.
(XHR)POST - https://192.168.43.95:8443/consumer/api/core/applications/application?id=16

The error that is reaching error interceptor is

In restangular error Interceptor app.module.ts (297,6)
[object Error]: {description: "Object doesn't support property or method 'throw'", message: "Object doesn't support property or method 'throw'", number: -2146827850, stack: "TypeError: Object doesn't support property or method 'throw' at Anonymous function (http://localhost:8100/build/vendor.js:104509:13) at CatchSubscriber.prototype.error (http://localhost:8100/build/vendor.js:169123:17) at Subscriber.prototype._error (http://localhost:8100/build/vendor.js:26123:9) at Subscriber.prototype.error (http://localhost:8100/build/vendor.js:26103:13) at Subscriber.prototype._error (http://localhost:8100/build/vendor.js:26123:9) at Subscriber.prototype.error (http://localhost:8100/build/vendor.js:26103:13) at Subscriber.prototype._error (http://localhost:8100/build/vendor.js:26123:9) at Subscriber.prototype.error (http://localhost:8100/build/vendor.js:26103:13) at onLoad (http://localhost:8100/build/vendor.js:81319:21) at t.prototype.invokeTask (http://localhost:8100/build/polyfills.js:3:15536)"}
description: "Object doesn't support property or method 'throw'"
message: "Object doesn't support property or method 'throw'"
number: -2146827850
stack: "TypeError: Object doesn't support property or method 'throw' at Anonymous function (http://localhost:8100/build/vendor.js:104509:13) at CatchSubscriber.prototype.error (http://localhost:8100/build/vendor.js:169123:17) at Subscriber.prototype._error (http://localhost:8100/build/vendor.js:26123:9) at Subscriber.prototype.error (http://localhost:8100/build/vendor.js:26103:13) at Subscriber.prototype._error (http://localhost:8100/build/vendor.js:26123:9) at Subscriber.prototype.error (http://localhost:8100/build/vendor.js:26103:13) at Subscriber.prototype._error (http://localhost:8100/build/vendor.js:26123:9) at Subscriber.prototype.error (http://localhost:8100/build/vendor.js:26103:13) at onLoad (http://localhost:8100/build/vendor.js:81319:21) at t.prototype.invokeTask (http://localhost:8100/build/polyfills.js:3:15536)"
proto: Object

My Error interceptor is as follows.

RestangularConfigurer.addErrorInterceptor( (response, subject, responseHandler) => {

 console.log("In restangular error Interceptor ");
 console.log( response );

if (response.status == 401) {
console.error('Invalid Token Response - must reset.', response);
return false; // error handled
} else if (response.status === 0) {
console.warn('Request failed with status of 0 - possible request interruption.', response);
return false; // error handled
}else {
let title = 'Error'; // + response.status;
let template = 'An unknown error occurred with your request. Please try again.';
if ( response.data && response.data.status) {
title = response.data.status.responseTitle;
template = response.data.status.responseMessage;
}
// Alert the user about the issue
utilServiceProvider.presentAlert({
title: title,
subTitle: template,
buttons : ['OK']
}).then( response => { return true;});
return true;
}
});

This is my corresponding restangular post

 requestApplication( applicationId : any) : Observable<any>{

    return this.applicationEndpoint.post( this.request(), {id: applicationId})
            .map(function( response , index, obs ) 
                           {  return {'isMarkedFavourite' : response.isMarkedFavourite, data : response.data } } );

}

With Stack trace this is what is the stack

ERROR Message : Object doesn't support property or method 'throw'
app.module.ts (311,11)

STACK : repeatRequest()@../../node_modules/ngx-restangular/dist/esm/src/ngx-restangular-http.js:44:0
error()@../../node_modules/rxjs/_esm5/internal/operators/catchError.js:33:0
_error()@../../node_modules/rxjs/_esm5/internal/Subscriber.js:80:0
error()@../../node_modules/rxjs/_esm5/internal/Subscriber.js:60:0
_error()@../../node_modules/rxjs/_esm5/internal/Subscriber.js:80:0
error()@../../node_modules/rxjs/_esm5/internal/Subscriber.js:60:0
_error()@../../node_modules/rxjs/_esm5/internal/Subscriber.js:80:0
error()@../../node_modules/rxjs/_esm5/internal/Subscriber.js:60:0
onLoad()@../../node_modules/@angular/common/fesm5/http.js:1558:0
t.prototype.invokeTask()@http://localhost:8100/build/polyfills.js:3:15536

[sushmavy]

Package.json

"dependencies": {
"@agm/core": "^1.0.0-beta.3",
"@angular/animations": "^6.1.0",
"@angular/cdk": "^6.3.3",
"@angular/cli": "^6.1.1",
"@angular/common": "6.1.0",
"@angular/compiler": "6.1.0",
"@angular/compiler-cli": "6.1.0",
"@angular/core": "6.1.0",
"@angular/forms": "6.1.0",
"@angular/material": "^6.4.0",
"@angular/platform-browser": "6.1.0",
"@angular/platform-browser-dynamic": "6.1.0",
"@angular/router": "^6.1.0",
"@angular/tsc-wrapped": "^4.4.7",
"@ionic-native/core": "3.12.1",
"@ionic-native/splash-screen": "3.12.1",
"@ionic-native/status-bar": "3.12.1",
"@ionic/storage": "^2.1.3",
"@types/googlemaps": "^3.30.10",
"@types/lodash": "^4.14.109",
"angular2-google-login": "^1.0.9",
"angularx-social-login": "^1.2.1",
"autoprefixer": "^9.0.1",
"cordova-sqlite-storage": "^2.3.1",
"ionic-angular": "^3.9.2",
"ionic-native": "^2.9.0",
"ionicons": "3.0.0",
"jquery": "^3.3.1",
"lodash": "^4.17.10",
"ngx-restangular": "^2.2.3",
"rxjs": "6.2.2",
"rxjs-compat": "^6.0.0-rc.0",
"slick-carousel": "^1.8.1",
"stacktrace-js": "^2.0.0",
"sw-toolbox": "3.6.0",
"zone.js": "0.8.26"
},

[rshchpkn]

@sushmavy Please check the referenced issue for the solution. Notify me if the solutions don't work and I will investigate more and reopen the issue