Exception using cordova-fetch for cordova-android

I can’t able to figure out what was happen to my ionic project suddenly it throws an exception with using cordova -fetch for cordova android can any one help me to solve this problem

D:\androidApps\testApp>ionic cordova platform add android

cordova platform add android --save
x Running command - failed!
[ERROR] Exception: Using cordova-fetch for cordova-android@~6.2.2

    Error: Failed to fetch platform cordova-android@~6.2.2
    Probably this is either a connection problem, or platform spec is
    Check your connection and platform name/version/URL.
    Error: cmd: Command failed with exit code 1 Error output:
    npm ERR! cb() never called!

D:\androidApps\testApp>ionic info

cli packages: (C:\Users\USER\AppData\Roaming\npm\node_modules)

@ionic/cli-utils  : 1.10.2
ionic (Ionic CLI) : 3.10.3

global packages:

Cordova CLI : 7.0.1

local packages:

@ionic/app-scripts : 2.1.4
Cordova Platforms  : none
Ionic Framework    : ionic-angular 3.6.1


Node : v6.11.3
npm  : 3.10.10
OS   : Windows 7


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