https://www.theregister.co.uk/2018/05/29/npm_teapot/ > npm, the widely used and defiantly lower-case Node.js package manager, on Monday briefly returned an error to users connecting to the registry via proxy who attempted the npm install command. > The error message declared "npm ERR! 418 I'm a teapot…", in reference to a RFC 2324, a tongue-in-cheek coffee pot communications protocol created as an April Fool's joke in 1998.