Native test android produces white screen

Ionic Framework ionic-v3
1

I’m testing (with phone gap build) my ionic app on android but i just get a blank white screen. As i inspect it with Chrome dev tools, I see the following errors:

polyfills.js:1 Failed to load resource: net::ERR_FILE_NOT_FOUND
main.js:1 Failed to load resource: net::ERR_FILE_NOT_FOUND
vendor.js:1 Failed to load resource: net::ERR_FILE_NOT_FOUND
main.css:1 Failed to load resource: net::ERR_FILE_NOT_FOUND
debug3.phonegap.com/target/target-script-min.js#66e4a5d4-6a3b-11e8-a348-0ec4f527fa0c:1 Failed to load resource: the server responded with a status of 404 (Not Found)
cordova_plugins.js:1 Failed to load resource: net::ERR_FILE_NOT_FOUND

On browser it works without problems when i run ionic serve.

Ionic info:

cli packages: (/usr/local/lib/node_modules)

    @ionic/cli-utils  : 1.19.2
    ionic (Ionic CLI) : 3.20.0

global packages:

    cordova (Cordova CLI) : 8.0.0 

local packages:

    @ionic/app-scripts : 3.1.8
    Cordova Platforms  : android 7.0.0 browser 5.0.3 ios 4.5.4
    Ionic Framework    : ionic-angular 3.9.2

System:

    Node  : v9.10.1
    npm   : 5.8.0 
    OS    : macOS High Sierra
    Xcode : Xcode 9.3.1 Build version 9E501 

Environment Variables:

    ANDROID_HOME : not set

Misc:

    backend : pro

app seems to load just index.html:

<!DOCTYPE html>
<html lang="en" dir="ltr">
<head>
  <meta charset="UTF-8">
  <title>Ionic App</title>
  <meta name="viewport" content="viewport-fit=cover, width=device-width, initial-scale=1.0, minimum-scale=1.0, maximum-scale=1.0, user-scalable=no">
  <meta name="format-detection" content="telephone=no">
  <meta name="msapplication-tap-highlight" content="no">

  <link rel="icon" type="image/x-icon" href="assets/icon/favicon.ico">
  <link rel="manifest" href="manifest.json">
  <meta name="theme-color" content="#4e8ef7">

  <!-- add to homescreen for ios -->
  <meta name="apple-mobile-web-app-capable" content="yes">
  <meta name="apple-mobile-web-app-status-bar-style" content="black">

  <!-- cordova.js required for cordova apps (remove if not needed) -->
  <script src="cordova.js"></script>

  <!-- un-comment this code to enable service worker
  <script>
    if ('serviceWorker' in navigator) {
      navigator.serviceWorker.register('service-worker.js')
        .then(() => console.log('service worker installed'))
        .catch(err => console.error('Error', err));
    }
  </script>-->

  <link href="build/main.css" rel="stylesheet">

</head>
<body>

  <!-- Ionic's root component and where the app will load -->
  <ion-app></ion-app>

  <!-- The polyfills js is generated during the build process -->
  <script src="build/polyfills.js"></script>

  <!-- The vendor js is generated during the build process
       It contains all of the dependencies in node_modules -->
  <script src="build/vendor.js"></script>

  <!-- The main bundle js is generated during the build process -->
  <script src="build/main.js"></script>

</body>
</html>