White page

Hi everyone, I’m a junior developer and I’m having a big problem doing a very simple thing.
I created a blank page with the ionic start myApp tabs command.
Through the ionic serve command, display the page correctly on my browser.
Without doing anything else, I did the build, again from the command line.
At build time, I don’t get any errors.
I install the APP on my smartphone.
Launch the APP is the result is a blank page: nothing!
Below I indicate what the ionic info command gives me:


   ionic (Ionic CLI)             : 4.12.0 (/usr/local/lib/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                  : 7.3.8
   @ionic/angular-toolkit        : 1.5.1


   cordova (Cordova CLI) : 6.0.0
   Cordova Platforms     : android 5.1.1
   Cordova Plugins       : cordova-plugin-ionic-keyboard 2.1.3, cordova-plugin-ionic-webview 4.0.1, (and 4 other plugins)


   NodeJS : v10.15.1 (/usr/local/bin/node)
   npm    : 6.9.0
   OS     : macOS High Sierra

Can anyone tell me what is wrong?
Thank you

If you’re getting a blank page then that probably means that a JavaScript error has occurred. Best way to solve it is to see what the error is, which you can do by remotely debugging your application:

iOS: https://www.youtube.com/watch?v=9J8AxhDxtTE
Android: https://www.youtube.com/watch?v=Y1rD954ZyKA

Thanks for the reply, I’ll watch the video on yuotube carefully

You Cordova is kind of outdated too!
npm i -g cordova

I have updated to the latest version of Cordova, but the problem arises again

Yes updating causes a problem in my system too dqfanfeedback