java.lang.NullPointerException: This exception has no message.

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at org.json.JSONTokener.nextCleanInternal(
at org.json.JSONTokener.nextValue(
at org.json.JSONObject.(
at org.json.JSONObject.(
at com.sdpcw.imalka.loginapp.BackgroundTask.onPostExecute(
at com.sdpcw.imalka.loginapp.BackgroundTask.onPostExecute(
at android.os.AsyncTask.finish(
at android.os.AsyncTask.access$600(
at android.os.AsyncTask$InternalHandler.handleMessage(
at android.os.Handler.dispatchMessage(
at android.os.Looper.loop(
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(

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