java.lang.NullPointerException

[ecgreb]

java.lang.RuntimeException: An error occured while executing doInBackground()
at android.os.AsyncTask$3.done(AsyncTask.java:300)
at java.util.concurrent.FutureTask.finishCompletion(FutureTask.java:355)
at java.util.concurrent.FutureTask.setException(FutureTask.java:222)
at java.util.concurrent.FutureTask.run(FutureTask.java:242)
at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:231)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
at java.lang.Thread.run(Thread.java:841)
Caused by: java.lang.NullPointerException
at org.scribe.oauth.OAuth10aServiceImpl.signRequest(OAuth10aServiceImpl.java:121)
at com.mapzen.core.DataUploadService.checkForUploadPermission(DataUploadService.java:285)
at com.mapzen.core.DataUploadService$1.doInBackground(DataUploadService.java:82)
at com.mapzen.core.DataUploadService$1.doInBackground(DataUploadService.java:79)
at android.os.AsyncTask$2.call(AsyncTask.java:288)
at java.util.concurrent.FutureTask.run(FutureTask.java:237)
... 4 more