Impacted versions

• OS Type: Debian
• OS Version: Debian 10 Bullseye
• Database Type: PostgreSQL
• Database version: X.y
• Modoboa: X.X.x
• installer used: Yes ?
• Webserver: Nginx

Steps to reproduce

With letsencrypt enabled and default install certs cannot be renewed due to lack of nginx plugin.

Current behavior

(..) produced an unexpected error: The requested nginx plugin does not appear to be installed. Skipping.

Expected behavior

automatic renewal

Possible Solution

apt-get install python3-certbot-nginx
apt-get install python-certbot-nginx
Adding relevant packages in the installer config file.