LDAP is running on Win2003. LDAP roles are working great, I got the same message when trying to delete a local MO account (however the user is no longer in the list of Operators after the error).
I am getting a very similar error except the error reads ‘HTTP: Error 28: Timeout was reached (error HTTP 500 in method /data/stop-actions)’ when I try to stop an action. I recently migrated to a new server on a newer version of of Windows Server (Windows Server 2003 - Windows Server 2008 R2). Is there a setting somewhere that can be adjusted? Maybe it has something to do with DNS since the name of the server was changed?