"Website Options" doesn't exist


I want to define wildcard on my server. So I need to make a change on Server Configuration -> Website Options but it doesn’t exist on “Server Configuration” menu.

I’m using 4.18.gpl version of Virtualmin and CentOS 6.5.
Anyone has any idea how I should fix it?

P.S. On my another server I’m using 4.17.gpl version and CentOS 6.5 and this sub-menu exits.