Pihole "DNS Service Not running" and "FTL offline" after v5 installation

root@SVR:/home/user# sudo systemctl status --full --no-pager pihole-FTL
● pihole-FTL.service - LSB: pihole-FTL daemon
   Loaded: loaded (/etc/init.d/pihole-FTL; generated)
   Active: active (exited) since Thu 2020-04-30 07:56:16 BST; 5min ago
     Docs: man:systemd-sysv-generator(8)
  Process: 367 ExecStart=/etc/init.d/pihole-FTL start (code=exited, status=0/SUCCESS)

Apr 30 07:55:51 SVR systemd[1]: Starting LSB: pihole-FTL daemon...
Apr 30 07:55:53 SVR pihole-FTL[367]: Not running
Apr 30 07:55:56 SVR su[425]: (to pihole) root on none
Apr 30 07:56:00 SVR su[425]: pam_unix(su:session): session opened for user pihole by (uid=0)
Apr 30 07:56:16 SVR pihole-FTL[367]: FTL started!
Apr 30 07:56:16 SVR systemd[1]: Started LSB: pihole-FTL daemon.
root@SVR:/home/user# journalctl --no-pager -u pihole-FTL | tail -20
-- Logs begin at Thu 2020-04-30 07:55:43 BST, end at Thu 2020-04-30 08:01:19 BST. --
Apr 30 07:55:51 SVR systemd[1]: Starting LSB: pihole-FTL daemon...
Apr 30 07:55:53 SVR pihole-FTL[367]: Not running
Apr 30 07:55:56 SVR su[425]: (to pihole) root on none
Apr 30 07:56:00 SVR su[425]: pam_unix(su:session): session opened for user pihole by (uid=0)
Apr 30 07:56:16 SVR pihole-FTL[367]: FTL started!
Apr 30 07:56:16 SVR systemd[1]: Started LSB: pihole-FTL daemon.
root@SVR:/home/user#