--prod build- app stuck after splash screen

Ionic:

ionic (Ionic CLI) : 4.11.0
Ionic Framework : @ionic/angular 4.0.0
@angular-devkit/build-angular : 0.13.8
@angular-devkit/schematics : 7.2.4
@angular/cli : 7.2.4
@ionic/angular-toolkit : 1.3.0

Cordova:

cordova (Cordova CLI) : 9.0.0
Cordova Platforms : android 8.0.0
Cordova Plugins : cordova-plugin-ionic-keyboard 2.1.3, cordova-plugin-ionic-webview 3.1.2, (and 20 other plugins)

System:

Android SDK Tools : 26.1.1 (C:\Users\Anis\AppData\Local\Android\Sdk)
NodeJS : v10.14.2 (C:\Program Files\nodejs\node.exe)
npm : 6.4.1
OS : Windows 10

Hi, my app runs well in normal build. but in --prod build it stucks after splash screen. in chrome inspect i got the error:

Unhandled Promise rejection: StaticInjectorError(ne)[t -> t]:
StaticInjectorError(Platform: core)[t -> t]:
NullInjectorError: No provider for t! ; Zone: ; Task: Promise.then ; Value: Error: StaticInjectorError(ne)[t -> t]:
StaticInjectorError(Platform: core)[t -> t]:
NullInjectorError: No provider for t!