hue file browser :server error 500 - hue

Trying to open hue file browser and it gives this error, please advise with a solution.
Server Error (500)
Sorry, there's been an error. An email was sent to your administrators. Thank you for your patience.
enter code here
Filename:
/usr/share/hue/build/env/lib/python2.6/site-packages/Django-1.2.3-py2.6.egg/django/core/handlers/base.py
/usr/share/hue/apps/filebrowser/src/filebrowser/views.py
/usr/share/hue/desktop/libs/hadoop/src/hadoop/fs/webhdfs.py
usr/share/hue/desktop/libs/hadoop/src/hadoop/fs/webhdfs.py`

you might be logged in hue browser as admin.
try to create user as hdfs and try to login then you will see files under file manager.

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