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:227)
	at android.app.AlertDialog.<init>(AlertDialog.java:204)
	at android.app.AlertDialog.<init>(AlertDialog.java:200)
	at android.app.AlertDialog.<init>(AlertDialog.java:145)
	at android.app.ProgressDialog.<init>(ProgressDialog.java:99)
	at com.entitcs.office_attendance.fragments.SelfieTaken.save_data_into_offline_mode_for_collegue(SelfieTaken.java:1991)
	at com.entitcs.office_attendance.fragments.SelfieTaken$25.onPostExecute(SelfieTaken.java:1956)
	at com.entitcs.office_attendance.fragments.SelfieTaken$25.onPostExecute(SelfieTaken.java:1911)
	at android.os.AsyncTask.finish(AsyncTask.java:771)
	at android.os.AsyncTask.access$900(AsyncTask.java:199)
	at android.os.AsyncTask$InternalHandler.handleMessage(AsyncTask.java:788)
	at android.os.Handler.dispatchMessage(Handler.java:106)
	at android.os.Looper.loop(Looper.java:254)
	at android.app.ActivityThread.main(ActivityThread.java:8243)
	at java.lang.reflect.Method.invoke(Native Method)
	at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:612)
	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1006)