Make sure libgpiod is installederror with sudo

[rinty35]

Hi

When i test python script to read DHT22 with my "pi" user it's ok.
When i test the same python script with sudo i've this error "RuntimeError: Timed out waiting for PulseIn message. Make sure libgpiod is installed."

I found other people who have the same problem but i don't find solution.

In my case, i'm on a raspberry B+ first generation with a raspbian 10 buster.
If we have a solution or idea, i'm very interesting.