sub-domain creation not working now

[TGates]

If you are not using Sentora DNS, we may not be able to help you much as this is what we are familiar with.

Double check what your settings are for your working sub domains (in the panel, your DNS server and domain registrar) and compare them to the non-working sub domains. Also check your httpd-vhosts.conf file and see if any entries are there for your working or non-working sub domains.