Author pages, aka author archives, are WordPress built-in pages which display a list of all posts written by the displayed author.
If the displayed author has no authored posts, then a misleading “Nothing Found” message is displayed. At least that’s WordPress standard. Themes might alter that.
Nothing Found for Authors with Posts
So you are getting the “Nothing Found” message for authors who do have authored posts? Keep reading to know what is happening.
The plugin allows you to have a guest author with the same data (display name, email, bio…) than an existing user. You might think that’s unnecessary at first, but some website administrators find that useful.
Display name and e-mail address are the fields used to retrieve author data on author archives. When a Guest Author and a WordPress User share the same display name and registered e-mail address, WordPress User takes precedence and his/her data is displayed. So, if that user doesn’t have any authored post, you will get the “Nothing Found” message.