Virtualmin error when managing SSL certificates

I was greeted with the following message when i went to update one of my SSL certificates in Virtualmin.
Error - Perl execution failed Undefined subroutine &virtual_server::
get_all_service_ssl_certs called at /usr/libexec/webmin/virtual-server/cert_form.cgi line 95.

This is a nice and easy fix:
simple restart webmin from the command line, on CentOS I accomplished by:
service webmin restart