After setup everything works fine, except for local address of my network.
My router is 192.168.8.1, my NAS is 192.168.8.3, etc.
Each of them is unreachable.
I disabled Never forward non-FQDNs and Never forward reverse lookups for private IP ranges in DNS settings of PiHole, but nope.
I tried also Listen on all interfaces, permit all origins but nothings change.
DHCP is off on my PiHole, it is on (I'm forced to) on my router.
Details about my system:
Latest Pihole on Raspberry pi zero
What I have changed since installing Pi-hole:
nothing
I didn't mapped anything, working on default installation....
I try to reach them by IP address. i.e. 192.168.8.1 (router setup page), 192.168.8.3 (NAS default page), etc. as I did normally....
Pi-hole is not involved if you are using the IP address to reach clients. Pi-hole resolves domain names to IP's - if you already have the IP there is no DNS request.
From your description, the problem appears to lie outside of Pi-hole.
Please upload a debug log and post just the token that is generated after the log is uploaded by running the following command from the Pi-hole host terminal: