ERR_FILE_NOT_FOUND(file:///android_asset/www/index.htm) & ERR_CONNECTION_REFUSED(http://localhost/)

Ionic Framework Ionic Angular
1

I have two errors after update Angular 7 to 8 and update @ionic/angular 4.6.0 to 4.11.9
ERR_FILE_NOT_FOUND(file:///android_asset/www/index.htm) ERR_CONNECTION_REFUSED(http://localhost/)

angular
angular625×780 61.5 KB

2

I can run .apk file in Android Studio simulator and in my phone !
I made this .apk with this command : ionic cordova build android
But when i copy this apk to my phone and install it i get these errors !