It doesn't appear the pihole-FTL is running; it should be on port 53.
*** [ DIAGNOSING ]: Ports in use
*:5900 vncserver- (IPv6)
*:5900 vncserver- (IPv4)
*:22 sshd (IPv4)
*:22 sshd (IPv6)
*:80 is in use by lighttpd
*:80 is in use by lighttpd
Let's check all your ports for activity - what is the output of these commands from the Pi terminal:
Are you certain? You have static IP'S listed in a configuration file inside /etc/dnsmasq.d. I don't believe Linux reads the file extension to see if the file should be used. Thus, all files in the directory are used.
Your next logical troubleshooting step is to enable a single static IP in one of your configuration files, restart FTL and see if there are errors. If so, figure out what's happening with that single configuration change. If no error, then add static IPs one at a time until you get an error, then stop and address that error.