why i getting this error when press onBackButton (...

# android

[CarlosBlanco]

why i getting this error when press onBackButton (onbackpre java.lang.IllegalArgumentException: Parameter specified as non-null is null: method kotlin.jvm.internal.Intrinsics.checkParameterIsNotNull, parameter view
at com.cmac.cajamovilaqp.menuItems.payment.view.payservice.fragment.FirstStepPayServiceFragment$onCreateView$1.onItemSelected(FirstStepPayServiceFragment.kt)