Error #2014: Feature is not available at this time. at flash.filesystem::File$/initDocumentsDir()

We have a customer that is occasionally getting this error on the startup of our AIR app:

Error: Error #2014: Feature is not available at this time.

at flash.filesystem::File$/initDocumentsDir()

at flash.filesystem::File$/get documentsDirectoryPath()

at flash.filesystem::File$/get documentsDirectory()

at licensing::LicensingManager()

at licensing::LicensingManager$/getInstance()

at Function/http://adobe.com/AS3/2006/builtin::apply()

at MethodInfo-13695()

at Function/http://adobe.com/AS3/2006/builtin::apply()

at mx.binding::Watcher/wrapUpdate()

at mx.binding::FunctionReturnWatcher/updateFunctionReturn()

at mx.binding::FunctionReturnWatcher/updateParent()

at _YNABWatcherSetupUtil/setup()

at YNAB/initialize()

at mx.managers::SystemManager/

http://www.adobe.com/2006/flex/mx/internal::childAdded()

at mx.managers::SystemManager/initializeTopLevelWindow()

at mx.managers::SystemManager/

http://www.adobe.com/2006/flex/mx/internal::docFrameHandler()

at mx.managers::SystemManager/docFrameListener()

I have never heard of this error before, and what makes it worse is that it is only occasional! Do any Adobe developers have any ideas?

Best regards,

Taylor