Android Question Fatal Exception: java.lang.NullPointerException

Gerät
Marke: TrendMicro
Modell: GI-I9500_TMMARS
Ausrichtung: Hochformat
Freier RAM: 17.27 GB
Freier Festplattenspeicher: 39.98 GB

Fatal Exception: java.lang.NullPointerException: Attempt to invoke interface method 'boolean java.util.List.isEmpty()' on a null object reference
at anywheresoftware.b4a.objects.IbHelper.startSetup(IbHelper.java:269)
at anywheresoftware.b4a.inappbilling3.BillingManager3.Initialize(BillingManager3.java:46)
at fg.MasterOfRegolarity.starter$ResumableSub_InitBillmanager.resume(starter.java:544)
at fg.MasterOfRegolarity.starter._initbillmanager(starter.java:522)
at fg.MasterOfRegolarity.starter._service_create(starter.java:964)
at java.lang.reflect.Method.invoke(Method.java)
at java.lang.reflect.Method.invoke(Method.java:372)
at anywheresoftware.b4a.BA.raiseEvent2(BA.java:191)
at anywheresoftware.b4a.BA.raiseEvent(BA.java:171)
at fg.MasterOfRegolarity.starter.onCreate(starter.java:56)
at android.app.ActivityThread.handleCreateService(ActivityThread.java:2785)
at android.app.ActivityThread.access$1800(ActivityThread.java:156)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1391)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5278)
at java.lang.reflect.Method.invoke(Method.java)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)

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Sub Service_Create
...
#if Release
   'Log("billmanager Starten")
   InitBillmanager
#end if

End Sub

Public Sub InitBillmanager
    billmanager.Initialize("billmanager", key)

    Wait For billmanager_BillingSupported (Supported As Boolean, Message As String)
    IsBillingSupported = Supported
    If Supported Then
        CallSubDelayed (Main, "GetOwnedProducts")
    End If
End Sub