Enabling LDAP User and Group Backend causes error

After making some tweaks to the LDAP integration with my AD I apparently set something incorrectly. When I go to Settings–>Users I now get the following error.

Internal Server Error

The server was unable to complete your request.
If this happens again, please send the technical details below to the server administrator.

More details can be found in the server log.

The server log has about a million entries such as this:

“Configuration Error (prefix ): No LDAP User Display Name given!”

I need to reset the configuration back to the default if possible. I’m just not sure how to do that or where the actual settings for this app are stored. I tried restoring the user_ldap folder from the source but the settings apparently are not stored in that folder. Any suggestion would be much appreciated and thanks in advance!