Ionic cordova build android --prod --release fails

I’m working with Ionic 3. When I try cordova build android --prod --release, build comes. but the signed APK is showing white screen after splash. When I try ionic cordova build android --prod --release, it is showing the following error. Please help me out on this. Very urgent. Thanks in advancepays error

What is your ionic info output?
What does your main.ts look like?

Ionic info

Ionic info gives

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

@ionic/cli-utils : 1.19.0
ionic (Ionic CLI) : 3.19.0
global packages:

cordova (Cordova CLI) : 7.1.0
local packages:

@ionic/app-scripts : 3.1.2
Cordova Platforms : android 6.3.0 windows 5.0.0
Ionic Framework : ionic-angular 3.9.2

Node : v9.2.0
npm : 5.5.1
OS : Windows 10
Environment Variables:

ANDROID_HOME : not set

backend : legacy


import { platformBrowserDynamic } from ‘@angular/platform-browser-dynamic’;

import { AppModule } from ‘./app.module’;


Strange, what happen with ionic build --prod?