DNS resolution failure

Your debug log shows that your Pi-Hole is working. This section of the debug log tests DNS resolution several different ways, and all were successful:

*** [ DIAGNOSING ]: Name resolution (IPv4) using a random blocked domain and a known ad-serving domain
[✓] ads233.hpg.ig.com.br is via localhost (
[✓] ads233.hpg.ig.com.br is via Pi-hole (
[✓] doubleclick.com is via a remote, public DNS server (

The problem is likely in your router setup. A good first step to test the Pi-Hole from a client is to assign the Pi-Hole IP as DNS on that specific client (not going through the router DNS assignment to get to the Pi-Hole)

Here is a good guide to get your clients onto Pi-Hole: