@jmendelsohn Here's what I think happened: you followed a web link to the person you wanted to follow who lives on, say, mastodon.social. That's a different server than yours, and you don't have an account there. It's a bit confusing for sure - but you're right that the way to follow them is putting their handle (@name@server) in the search bar on YOUR server, and then you can view their profile and follow.