Your system has 1.83 GB of memory, which is at or above the Virtualmin recommended minimum of 256 MB.
Virtualmin is configured to setup DNS zones, but this system is not setup to use itself as a DNS server. Either add 127.0.0.1 to the list of DNS servers, or turn off the BIND feature on the module config page. It appears that DHCP is being used to dynamically configure your network interfaces, which can cause the DNS servers to be set based on settings provided by the DHCP server. Using a static IP address is strongly recommended with Virtualmin.
The above output is returned after running Re-check and refresh configuration. I would like some help in resolving this. I was just presented with a solution for editing the /etc/resolv.conf file and adding "nameserver 127.0.0.1 which fixed the problem of Apache2 not restarting. It now starts cleanly. My question is how to have a clean return of info regarding Virtualmin functioning properly on the server? Also, I did not perform this install myself. A NOC engineer did it for me since my server is quite a distance from me. There are references to another web site domain that I own but, in reality, has nothing to do with the web site domain to be hosted on this server. I have httpd.conf file info posted on pastebin.