There are two common things that could be causing this issue:
1. Your /etc/resolv.conf file does not have the necessary DNS information setup. Check that file to make sure the proper DNS IP addresses are there. If you are not sure what this means or what the IP addresses are supposed to be, submit a ticket to our support department.
2. There is most likely an issue with your zonetemplates in /usr/local/cpanel/etc. You can fix this by running the following from the command line:
cat /usr/local/cpanel/etc/zonetemplates/standardvirtualftp > /var/cpanel/zonetemplates/standardvirtualftp
cat /usr/local/cpanel/etc/zonetemplates/standard > /var/cpanel/zonetemplates/standard
cat /usr/local/cpanel/etc/zonetemplates/simple > /var/cpanel/zonetemplates/simple