I make some notes here to help other people who might have the same issue with me.
I have a problem with PowerDNS. In the web panel service, I saw that it's stopped. Pressed play to start and the status said it's starting but it's still stop.
Using SSH, I use systemctl start pdns and got this error:
Job for pdns.service failed because the control process exited with error code.
See "systemctl status pdns.service" and "journalctl -xe" for details.
So, I open the journalct -xe and found out the error:
Unable to bind UDP socket to '0.0.0.0:53': Address already in use
If you find that error, try this code:
systemctl stop systemd-resolved.service
then start your pdns again:
systemctl start pdns
It should have start normally now. Hope that helps..