When I go to the web interface it takes 30 seconds to load any page. I've seen someone else report the same problem.
In addition I am getting the dreaded "DNS service not running" message.
Yet despite this the PiHole is working fine as far as I can tell. My network speed is normal and ads are being blocked. If I reboot the RaspberryPi it fixes both problems but then they re-appear the next day.
pi@raspberrypi:~ $ sudo service pihole-FTL start
Job for pihole-FTL.service failed because the control process exited with error code.
See "systemctl status pihole-FTL.service" and "journalctl -xe" for details.
pi@raspberrypi:~ $ systemctl status pihole-FTL.service
● pihole-FTL.service - LSB: pihole-FTL daemon
Loaded: loaded (/etc/init.d/pihole-FTL; generated)
Active: failed (Result: exit-code) since Thu 2020-06-11 13:12:01 CDT; 20s ago
Docs: man:systemd-sysv-generator(8)
Process: 9569 ExecStart=/etc/init.d/pihole-FTL start (code=exited, status=1/FAILURE)
Jun 11 13:11:56 raspberrypi systemd[1]: Starting LSB: pihole-FTL daemon...
Jun 11 13:12:01 raspberrypi pihole-FTL[9569]: .....
Jun 11 13:12:01 raspberrypi pihole-FTL[9569]: Not stopped; may still be shutting down or shutdown may have failed, killiJun 11 13:12:01 raspberrypi systemd[1]: pihole-FTL.service: Control process exited, code=exited, status=1/FAILURE
Jun 11 13:12:01 raspberrypi systemd[1]: pihole-FTL.service: Failed with result 'exit-code'.
Jun 11 13:12:01 raspberrypi systemd[1]: Failed to start LSB: pihole-FTL daemon.