"DNS service is NOT running" after update

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Expected Behaviour:

I've been running Pi-hole on my Raspberry PI for more than a year with no problems. Today I updated it by running "sudo apt full-upgrade && pihole -up". I expected it to continue working normally after the update.

Actual Behaviour:

When update has finished I restarted the box, and now "pihole status" returns this:

pi@berry:~ $ pihole status
[✗] DNS service is NOT running
[✗] DNS service is NOT running

Debug Token:

https://tricorder.pi-hole.net/OcB0tFxt/

Your log shows Pi-hole is running (active):

*** [ DIAGNOSING ]: Pi-hole processes
[✓] lighttpd daemon is active
[✓] pihole-FTL daemon is active

*** [ DIAGNOSING ]: Pi-hole-FTL full status
   ● pihole-FTL.service - LSB: pihole-FTL daemon
   Loaded: loaded (/etc/init.d/pihole-FTL; generated)
   Active: active (exited) since Sun 2023-11-19 21:50:58 CET; 2h 14min ago
     Docs: man:systemd-sysv-generator(8)
  Process: 482 ExecStart=/etc/init.d/pihole-FTL start (code=exited, status=0/SUCCESS)

Nov 19 21:50:52 berry systemd[1]: Starting LSB: pihole-FTL daemon...
Nov 19 21:50:52 berry pihole-FTL[482]: Not running
Nov 19 21:50:52 berry pihole-FTL[482]: sh: 0: Can't open /opt/pihole/pihole-FTL-poststop.sh
Nov 19 21:50:52 berry pihole-FTL[482]: sh: 0: Can't open /opt/pihole/pihole-FTL-prestart.sh
Nov 19 21:50:52 berry su[498]: (to pihole) root on none
Nov 19 21:50:52 berry su[498]: pam_unix(su:session): session opened for user pihole by (uid=0)
Nov 19 21:50:58 berry pihole-FTL[482]: FTL started!
Nov 19 21:50:58 berry systemd[1]: Started LSB: pihole-FTL daemon.