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 certbotCheck 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
