java.lang.NullPointerException: Attempt to invoke virtual method 'android.content.res.Resources$Theme android.content.Context.getTheme()' on a null object reference
	at android.app.AlertDialog.resolveDialogTheme(AlertDialog.java:248)
	at android.app.AlertDialog.<init>(AlertDialog.java:1318)
	at android.app.AlertDialog.<init>(AlertDialog.java:228)
	at android.app.AlertDialog.<init>(AlertDialog.java:210)
	at android.app.AlertDialog.<init>(AlertDialog.java:155)
	at android.app.ProgressDialog.<init>(ProgressDialog.java:99)
	at com.entitcs.office_attendance.e.c1.H(Unknown Source:6)
	at com.entitcs.office_attendance.e.c1$n.onErrorResponse(Unknown Source:19)
	at d.c.b.n.deliverError(Unknown Source:8)
	at d.c.b.f$b.run(Unknown Source:40)
	at android.os.Handler.handleCallback(Handler.java:790)
	at android.os.Handler.dispatchMessage(Handler.java:99)
	at android.os.Looper.loop(Looper.java:214)
	at android.app.ActivityThread.main(ActivityThread.java:6977)
	at java.lang.reflect.Method.invoke(Native Method)
	at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:528)
	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:910)