Problem:
You are trying to request a Let’s Encrypt certificate using certbot, but instead you see an error message like
certbot: error: unrecognized arguments: --dns-cloudflare-credentials /root/.secrets/cloudflare.ini
Solution:
Install the required package. This is the solution if you have installed python3-certbot as an apt package:
sudo apt -y install python3-certbot-dns-cloudflare
This is the solution if you have installed certbot as a snap:
sudo snap set certbot trust-plugin-with-root=ok sudo snap install certbot-dns-cloudflare