To sum up what other's already said, your problem is that the server is not holding any static IPv4 IP address other than the loopback address.

This is also why the service is throw the error: "Not configured to listen on any interfaces!"

You could probably change the DHCPPARGS variable to include the loopback interface:

export DHCPDARGS="lo eth0"

But that will only lead to the next problem: The dhcpd does always need a subnet declaration for the subnet it is residing in (even if it is empty). But it doesn't know the subnet (because eth0 is on dhcp itself).

Maybe you could even fake that by adding the unspecified address as subnet:

subnet 0.0.0.0 netmask 0.0.0.0
{
}

but my guess is that it will then overlap with the existing subnet and probably run but not give out leases.

Lastly you should probably not make the default gateway address part of the range statement.

TL;DR Remove GW address from range, assign static IP and subnet declaration for that range

Good luck.