Pi-hole does not blocking ads anymore

Hi,
a few days ago, my pi-hole stops blocking adds on my pc.
I'm using a Raspi 4 with Raspberry Pi OS.
I already updated my system with sudo apt-get update && sudo apt-get upgrade
I already updated pi-hole with pihole -up
I entered the IP of the pi-hole on the DNS settings at my FritzBox.

Everything worked fine but then it stops blocking.
I also don't see any bars when I log into my userinterface.

Her you can see my debug token:
https://tricorder.pi-hole.net/agoo8wygny

Can you post a screenshot of what you see on the user interface?

Are you seeing queries in the query?

You advertise your router's IP as DNS server via DHCP. So I guess Pi-hole is your router's upstream DNS server. Did you make sure it's your "Preferred DNSv4 server" and "Alternative DNSv4 server"?

https://docs.pi-hole.net/routers/fritzbox/

Here is a picture what I see in the Dashboard:

In the DNS settings of my router I only put the pihole IP in the preferred DNS.
Alternative DNS is 8.8.4.4
This has been working all the time.

When I now change it and put the Pihole IP as alternative DNS as well, my network doesn't work any more.

Did you find some solutions in the debug token?

Pi-hole isn't blocking because it's not being used.

Having another DNS as alternative will almost always end up with clients using the alternative DNS and not Pi-hole.

Okay, but when I enter the Pihole IP as preferred and alternative, my internet is completely gone.
So it seems like there is something wrong with my pihole config, right?

You debug log looks normal. I don't think it's the Pi-hole that is not working.

Can you explain a bit more about where you are inputting the IP address, what IP address you are using and what clients you are using?

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