When updating to DietPi 9.11.2 with Pi-Hole (v6) installed, there’s a prompt to change web ui port from default to 8089. If I accept this change, it will make web UI inaccessible if I don’t specify the new port.
I had to change webserver.ports
back to default 80o,443os,[::]:80o,[::]:443os
in /etc/pihole/pihole.toml
. This should be better documented in either DietPi changelog or in Pi-Hole documentation.