PowerDNS may sometimes not load a DNS zone due to certain detected failures.
The zones can be seen with the following command:
It is recommended to address these, however, if you would like similar functionality to BIND where certain errors in the zone do not cause the zone file to be completely omitted, you may enable similar functionality.
Open the PowerDNS configuration file in your preferred text editor:
Locate the following line and set it to "yes"
Finally, restart the DNS server: