How do you change the cyrus password on the OpenExchange server. When
attempting to change this password from the web interface I receive the
following error message:

Internal Server Error
The server encountered an internal error or misconfiguration and was
unable to complete your request.
Please contact the server administrator, you@your.address and inform them
of the time the error occurred, and anything you might have done that may
have caused the error.

More information about this error may be available in the server error

Please advise.