Error 418: I'm a teapot

Found this funny error code while looking through MDN docs: https://developer.mozilla.org/en-US/docs/Web/HTTP/Status/418

Comments

[Edenn Touitou]

I encountered this one for real once, last year. When I tried to log in to the linkedin learning platform of my school. My credentials were corrects, but I don't know why I could not log in, and why this error was prompted