// java.lang.NullPointerException: Attempt to invoke virtual method 'void de.hirtenstrasse.michael.lnkshortener.SetupFinalStepLoading.enableFinishButton()' on a null object reference
// at de.hirtenstrasse.michael.lnkshortener.SetupActivity.enableFinishButton(SetupActivity.java:571)
// at de.hirtenstrasse.michael.lnkshortener.SetupActivity$3.onResponse(SetupActivity.java:117)
// at de.hirtenstrasse.michael.lnkshortener.SetupActivity$3.onResponse(SetupActivity.java:98)
// at com.android.volley.toolbox.StringRequest.deliverResponse(StringRequest.java:60)
// at com.android.volley.toolbox.StringRequest.deliverResponse(StringRequest.java:30)
// at com.android.volley.ExecutorDelivery$ResponseDeliveryRunnable.run(ExecutorDelivery.java:99)
// at android.os.Handler.handleCallback(Handler.java:739)
// at android.os.Handler.dispatchMessage(Handler.java:95)
// at android.os.Looper.loop(Looper.java:148)
// at android.app.ActivityThread.main(ActivityThread.java:5417)
// at java.lang.reflect.Method.invoke(Native Method)
// at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
// at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)