Accessing a file when not logged in throws Exception

[cmonnom]

When accessing directly an url of form without logging into Morphbank:
http://dev.morphbank.net/webfilez/FILE_NAME?contents=true

Fatal error: Uncaught exception 'Exception' with message 'Folder Callback undefined! Did you not pass it into the Webfilez app?' in /data/mb32testsite/webfilez/libs/Webfilez.php:199 Stack trace: #0 /data/mb32testsite/webfilez/libs/Webfilez.php(150): Webfilez->getFolder() #1 /data/mb32testsite/webfilez/libs/Webfilez.php(99): Webfilez->loadLibraries() #2 /data/mb32testsite/webfilez/libs/Webfilez.php(59): Webfilez->__construct(NULL) #3 /data/mb32testsite/webfilez/index.php(14): Webfilez::main() #4 {main} thrown in /data/mb32testsite/webfilez/libs/Webfilez.php on line 199