Let’s Encrypt ACMEv2 protocol upgrade

You should upgrade to an ACMEv2 compatible client before June 1, 2020, or certificate issuance will fail.

sudo apt update
sudo apt install --only-upgrade certbot

Check the version:

certbot --version

If issues/problems, try this:

sudo add-apt-repository ppa:certbot/certbot

Test it running this:

sudo certbot renew --dry-run

By MrAddon