sudo: pamadmin : pam_authenticate: Shared object load failure

Hi Experts,

I am getting error while doing a sudo su on hpux server. the OS version is 11.23 and hardware is ia64 hp server rx3600.

error details: sudo: pam_authenticate: Shared object load failure

Please let us me know what's the exact issue? is there any problem with sudo or it's the problem with PAM authentication. How to reslove this issue?