Android Kotlin : Error Unresolved reference: DaggerAppComponent

apply plugin: 'kotlin-android'
apply plugin: 'kotlin-kapt'   

And in your dependencies:

implementation "com.google.dagger:dagger:2.x"
implementation "com.google.dagger:dagger-android:2.x"
implementation "com.google.dagger:dagger-android-support:2.x"
kapt "com.google.dagger:dagger-compiler:2.x"
kapt "com.google.dagger:dagger-android-processor:2.x"