It looks like that sudo or some other system command is trying to use OpenLdap from wait I saw in this email and it cannot find the library for it.

I guess the question that needs to be asked, is where did the installation come from and how was it setup? If it was compiled to LDAP and then someone removed LDAP then that might be the root of your issue.

All this is just a guess, take it for what it is... :)