title: IONIC 4 ERROR ionic cordova build android --prod --release
body: <p>I'm getting error while building ionic4 app to android release.<a href="https://i.stack.imgur.com/eoM75.png" rel="nofollow noreferrer">Here is the screenshot of error</a></p>
  
  <p>Ionic:</p>
  
  <pre><code>Ionic CLI : 5.2.3 (C:\Users\user\AppData\Roaming\npm\node_modules\ionic) Ionic Framework : @ionic/angular 4.6.2 @angular-devkit/build-angular : 0.13.9 @angular-devkit/schematics : 7.3.9 @angular/cli : 7.3.9 @ionic/angular-toolkit : 1.5.1
  </code></pre>
  
  <p>Cordova:</p>
  
  <pre><code>Cordova CLI : 9.0.0 (cordova-lib@9.0.1) Cordova Platforms : android 8.0.0, browser 6.0.0 Cordova Plugins : cordova-plugin-ionic-keyboard 2.1.3, cordova-plugin-ionic-webview 4.1.1, (and 13 other plugins)
  </code></pre>
  
  <p>Utility:</p>
  
  <pre><code>cordova-res : 0.6.0 native-run : 0.2.8
  </code></pre>
  
  <p>System:</p>
  
  <pre><code>NodeJS : v10.16.0 (C:\Program Files\nodejs\node.exe) npm : 6.10.2 OS : Windows 10
  </code></pre>