Ionic5 prod build fails

Ionic Framework
3

Thanks @EinfachHans but still the same problem after upgrading ionic/cli

> ionic info

Ionic:

   Ionic CLI                     : 6.1.0 (/usr/local/lib/node_modules/@ionic/cli)
   Ionic Framework               : @ionic/angular 5.0.0
   @angular-devkit/build-angular : 0.801.3
   @angular-devkit/schematics    : 8.1.3
   @angular/cli                  : 8.1.3
   @ionic/angular-toolkit        : 2.1.2

Cordova:

   Cordova CLI       : 8.0.0
   Cordova Platforms : none
   Cordova Plugins   : no whitelisted plugins (0 plugins total)

Utility:

   cordova-res : not installed
   native-run  : not installed

System:

   Android SDK Tools : 26.1.1 (/Users/lucascrivelli/Library/Android/sdk)
   ios-deploy        : 1.9.4
   NodeJS            : v10.16.1 (/usr/local/bin/node)
   npm               : 6.9.0
   OS                : macOS Catalina
   Xcode             : Xcode 10.3 Build version 10G8