Problem in ionic 4 with cordova-android@8.0.0, blank screen when start on device

I had a problem with the firebase plugin on ionic 4 the app just didn’t compile and I had to upgrade cordova-android@7 to android@8.0.0 the app compiled, but for the start just brank, there is Ionic info.

Ionic:

   Ionic CLI                     : 5.2.3 (C:\Users\USER\AppData\Roaming\npm\node_modules\ionic)
   Ionic Framework               : @ionic/angular 4.3.1
   @angular-devkit/build-angular : 0.13.8
   @angular-devkit/schematics    : 7.3.8
   @angular/cli                  : 7.3.9
   @ionic/angular-toolkit        : 1.5.1

Cordova:

   Cordova CLI       : 9.0.0 (cordova-lib@9.0.1)
   Cordova Platforms : android 8.0.0
   Cordova Plugins   : cordova-plugin-ionic-keyboard 2.1.3, cordova-plugin-ionic-webview 4.0.1, (and 18 other plugins)

Utility:

   cordova-res : 0.6.0
   native-run  : 0.2.8

System:

   Android SDK Tools : 26.1.1 (C:\Users\USER\AppData\Local\Android\Sdk)
   NodeJS            : v10.16.0 (C:\Program Files\nodejs\node.exe)
   npm               : 6.9.0
   OS                : Windows 10

Did you rebuild your platform? You may have to remove / add android platform.

Yes i did it and also downgraded to Cordova Android 7.1.4 but still not working!