As you can see on the Amazing committer badge on Discourse Meta badge page, @Robin_Ward1 shows up as a user who has earned the Amazing committer badge.
If you click on their card, it will give you the card loading, then immediately close. If you open their profile in a new tab, it will give the “Oops! That page doesn’t exist or is private” error.
Of course I am not sure what happened to this user as I am not an admin here, but I don’t think that users should show up on badge pages when they don’t exist.