Blank page in Android using ionic v4

Hello

I can probe create a simple blank project and when deploy app in my cellphone, show blank page, the error is:

The key “viewport-fit” is not recognized and ignored.
Uncaught SyntaxError: Use of const in strict mode.

The Error is in line 69616 in vendor.js

function setupConfig(config) {
const win = window; <-- error
const Ionic = win.Ionic;

My ionic info

Ionic:

ionic (Ionic CLI) : 4.1.0 (C:\testionic4\node_modules\ionic)
Ionic Framework : @ionic/angular 4.0.0-beta.3
@angular-devkit/core : 0.7.5
@angular-devkit/schematics : 0.7.5
@angular/cli : 6.1.5
@ionic/ng-toolkit : 1.0.7
@ionic/schematics-angular : 1.0.5

Cordova:

cordova (Cordova CLI) : 8.0.0
Cordova Platforms : android 7.1.1
Cordova Plugins : cordova-plugin-ionic-keyboard 2.1.2, cordova-plugin-ionic-webview 2.1.0, (and 3 other plugins)

System:

NodeJS : v8.11.4 (C:\Program Files\nodejs\node.exe)
npm : 5.6.0
OS : Windows 10

I run the app in my cellphone using command

ionic cordova run android --production

what is the problem?, can anybody help me please?

Thank you.

The same error:

The key “viewport-fit” is not recognized and ignored.
Uncaught SyntaxError: Use of const in strict mode.

Now install the lastest android beta 5

Ionic:

ionic (Ionic CLI) : 4.1.0 (C:\testionic4\node_modules\ionic)
Ionic Framework : @ionic/angular 4.0.0-beta.5
@angular-devkit/core : 0.7.5
@angular-devkit/schematics : 0.7.5
@angular/cli : 6.1.5
@ionic/ng-toolkit : 1.0.7
@ionic/schematics-angular : 1.0.5

Cordova:

cordova (Cordova CLI) : 8.0.0
Cordova Platforms : android 7.0.0
Cordova Plugins : not available

System:

NodeJS : v8.11.4 (C:\Program Files\nodejs\node.exe)
npm : 5.6.0
OS : Windows 10