Installer plugin missing?

[Bruce5051]

@cvedovini

The version of my client is (e.g. output of certbot --version or certbot-auto --version if you're using Certbot): certbot 0.23.0.dev0

Maybe upgrade Certbot 2.10.0 Release using the instructions from here https://certbot.eff.org/.
(Possibly remove the version or versions you have installed first).