Ionic 3 and firebase when download an audio it gives an error

when i try to download an audio from firebase storage it gives me an error .

here is my .ts file

import { FirebaseProvider } from './../../providers/firebase/firebase';
import { Component } from '@angular/core';
import { NavController } from 'ionic-angular';
import { FirebaseListObservable } from 'angularfire2/database';
import { FileTransfer, FileUploadOptions, FileTransferObject } from '@ionic-
native/file-transfer';
import { File } from '@ionic-native/file';
import { NativeAudio } from '@ionic-native/native-audio';

@Component({
selector: 'page-home',
templateUrl: 'home.html'
})
export class HomePage {

constructor(private transfer: FileTransfer,private file: File,private
nativeAudio: NativeAudio) {
const fileTransfer: FileTransferObject = this.transfer.create();
this.download();
this.nativeAudio.preloadSimple('uniqueId1', this.file.dataDirectory +
'test.mp3').then((res) => {
console.log('Mp3 ready');
}, (error) => {
console.log("Some error during load the audio "+error);
});

this.nativeAudio.play('uniqueId1').then((onSuccess)=>{
console.log('Mp3 reproduced ok');
}, (onError)=>{
console.log("Some error during reproduce of the audio "+onError);
});

// can optionally pass a callback to be called when the file is done playing
//this.nativeAudio.play('uniqueId1', () => console.log('uniqueId1 is done
playing'));

}


function download() {
const url = 'https://firebasestorage.googleapis.com/v0/b/database-
1b1c9.appspot.com/o/p10_1.mp3?alt=media&token=bb1551d7-7233-4414-ac61-
e6ecd05d1d89';
fileTransfer.download(url, this.file.dataDirectory + 'test.mp3').then((entry)
=> {
console.log('download complete: ' + entry.toURL());
}, (error) => {
console.log('Error during download: '+error);
});
}


and attach pic is an error which im encountering.

kindly help me to remove this error so that i may able to download this audio from storage firebase.

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