Crash in encfs-java local file provider

[mrpdaemon]

Got 3 instances of the following issue on Google Developer Console:

java.lang.RuntimeException: An error occured while executing doInBackground()
at android.os.AsyncTask$3.done(AsyncTask.java:200)
at java.util.concurrent.FutureTask$Sync.innerSetException(FutureTask.java:274)
at java.util.concurrent.FutureTask.setException(FutureTask.java:125)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:308)
at java.util.concurrent.FutureTask.run(FutureTask.java:138)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1088)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:581)
at java.lang.Thread.run(Thread.java:1019)
Caused by: java.lang.NullPointerException
at org.mrpdaemon.sec.encfs.EncFSLocalFileProvider.listFiles(EncFSLocalFileProvider.java:152)
at org.mrpdaemon.android.encdroid.EDFileChooserActivity.fill(EDFileChooserActivity.java:341)
at org.mrpdaemon.android.encdroid.EDFileChooserActivity.access$0(EDFileChooserActivity.java:335)
at org.mrpdaemon.android.encdroid.EDFileChooserActivity$EDFileChooserFillTask.doInBackground(EDFileChooserActivity.java:495)
at org.mrpdaemon.android.encdroid.EDFileChooserActivity$EDFileChooserFillTask.doInBackground(EDFileChooserActivity.java:1)
at android.os.AsyncTask$2.call(AsyncTask.java:185)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:306)
... 4 more

being tracked as encfs-java issue 51:
mrpdaemon/encfs-java#51