yum update failing for web-virtual-server

When doing a yum update tonight I got this error:

virtual-server::module_install failed : Undefined subroutine &virtual_server::postfix_installed called at /usr/libexec/webmin/virtual-server/virtual-server-lib.pl line 7868

The virtualmin module claims to now be at v3.10 but clearly something went wrong somewhere in the update.

Status: 
Closed (fixed)