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An error occured while executing doInBackground()
java.lang.NullPointerException: 	at fr.free.nrw.commons.upload.UploadController$2.doInBackground(UploadController.java:145)	at fr.free.nrw.commons.upload.UploadController$2.doInBackground(UploadController.java:112)	at android.os.AsyncTask$2.call(AsyncTask.java:287)	at java.util.concurrent.FutureTask.run(FutureTask.java:234)	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1080)	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:573)	at java.lang.Thread.run(Thread.java:838)