I don't have specifics on why or what was done before this happened... as I typically use the command line anyway.  However it seems that the web interface for Cobbler has stopped authenticating.  It always responds with invalid password and or username.  I have tried re-installing the interface, recreating the user among other things exhausting my options. The only error that I can seem to come across is this:

Fri Feb 27 17:56:36 2015 - INFO | Exception occured: <type 'exceptions.AttributeError'>

Fri Feb 27 17:56:36 2015 - INFO | Exception value: BootAPI instance has no attribute 'authn'

Fri Feb 27 17:56:36 2015 - INFO | Exception Info:

  File "/usr/lib/python2.6/site-packages/cobbler/remote.py", line 2087, in _dispatch

    return method_handle(*params)

   File "/usr/lib/python2.6/site-packages/cobbler/remote.py", line 1886, in login

    if self.__validate_user(login_user,login_password):

   File "/usr/lib/python2.6/site-packages/cobbler/remote.py", line 1783, in __validate_user

    return self.api.authenticate(input_user,input_password)

   File "/usr/lib/python2.6/site-packages/cobbler/api.py", line 1025, in authenticate

    rc = self.authn.authenticate(self,user,password)

As it seems to be an issue directly with python code... (although I can't imagine why it would suddenly change) I am honestly not sure what to do.

Any help is greatly appreciated.

Thanks 

Scott