Install latest version of certbot.
This makes Certbot is useful with the latest Ubuntu. Probably for latest Debian as well and is also valid for older Ubuntu 21.04 / 21.10.
Run the following command with a sudoer:
curl -o- https://raw.githubusercontent.com/vinyll/certbot-install/master/install.sh | bash
curl -o- https://raw.githubusercontent.com/vinyll/certbot-install/master/uninstall.sh | bash
You may prefer the regular installation of certbot from official PPA.
However, if you experiment the following error with some Ubuntu releases, this install will prevent and solve.
AttributeError: module 'acme.challenges' has no attribute 'TLSSNI01'
This is also interesting if you need to work with the latest release of certbot at all.