DNS service not running, FTL is offline, port 53 already in use

You have an instance of dnsmasq running on the Pi, which is preventing pihole-FTL from binding to port 53.

[✗] udp:*:53 is in use by dnsmasq (https://docs.pi-hole.net/main/prerequisites/#ports)

Here is a related thread from a few years back. That user had BIND running. Use the same process to disable dnsmasq on your install.

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