Package build failed with crosswalk-webkit

Hi Guys, im trying to Build a Package with crosswalk-webkit plugin but the build failed with no errors.

Im trying to use crosswalk-webkit to give compatibility with android 4.4.2 playing local videos.

{
  "name": "habitat",
  "version": "0.0.1",
  "author": "Ionic Framework",
  "homepage": "http://ionicframework.com/",
  "private": true,
  "scripts": {
    "start": "ionic-app-scripts serve",
    "clean": "ionic-app-scripts clean",
    "build": "ionic-app-scripts build",
    "lint": "ionic-app-scripts lint"
  },
  "dependencies": {
    "@angular/animations": "5.2.11",
    "@angular/common": "5.2.11",
    "@angular/compiler": "5.2.11",
    "@angular/compiler-cli": "5.2.11",
    "@angular/core": "5.2.11",
    "@angular/forms": "5.2.11",
    "@angular/http": "5.2.11",
    "@angular/platform-browser": "5.2.11",
    "@angular/platform-browser-dynamic": "5.2.11",
    "@ionic-native/core": "~4.11.0",
    "@ionic-native/splash-screen": "~4.11.0",
    "@ionic-native/status-bar": "~4.11.0",
    "@ionic/storage": "2.1.3",
    "cordova-android": "^7.0.0",
    "cordova-android-support-gradle-release": "^1.4.4",
    "cordova-browser": "5.0.4",
    "cordova-plugin-device": "^2.0.2",
    "cordova-plugin-ionic-keyboard": "^2.1.2",
    "cordova-plugin-ionic-webview": "^1.2.1",
    "cordova-plugin-splashscreen": "^5.0.2",
    "cordova-plugin-whitelist": "^1.3.3",
    "ionic-angular": "3.9.2",
    "ionicons": "3.0.0",
    "rxjs": "5.5.11",
    "sw-toolbox": "3.6.0",
    "zone.js": "0.8.26"
  },
  "devDependencies": {
    "@ionic/app-scripts": "3.1.11",
    "typescript": "~2.6.2"
  },
  "description": "An Ionic project",
  "cordova": {
    "plugins": {
      "cordova-plugin-whitelist": {},
      "cordova-plugin-device": {},
      "cordova-plugin-splashscreen": {},
      "cordova-plugin-ionic-keyboard": {},
      "cordova-android-support-gradle-release": {},
      "cordova-plugin-ionic-webview": {}
    },
    "platforms": [
      "android",
      "browser"
    ]
  }
}