this answer solve my problem, many thanks!
i have this enviroment btw
Ionic CLI : 5.2.3
Ionic Framework : ionic-angular 3.9.2
@ionic/app-scripts : 3.2.2
Cordova:
Cordova CLI : 8.1.2 (cordova-lib@8.1.1)
Cordova Platforms : android 7.1.4