I’ll look into the Mailman issue – however, do you need the mailman feature for this particular domain? If you disable that feature when creating the domain, it should be able to create the Virtual Server.
OK, I disabled while creating a new server, it worked!
But in my Status page there is a warning:>
“Virtualmin’s configuration has not been checked since it was last updated. Click the button below to verify it now.”
If I try to check it gives me:
" The mailman queue processor /var/lib/mailman/bin/qrunner is not running on your system. It can be started in the Bootup and Shutdown module.