User name not showing on author page

Your URL’s are broken at the moment (error 404). I suggest you make the username different from the display name. For example, admin can be renamed ‘Site Admin’ if necessary, but spaces in username lead to ambiguities. I think a validation step would prevent them from being created (??).

Those are sample URLs, not the real ones.

The usernames in this case are different than the nicknames (what I assume you mean by display name). In my case, for example, my username is kmsiever and my nickname is Kim Siever.

I fixed it,

Instead of:

<?php
if(isset($_GET[‘author_name’])) :
$curauth = get_userdatabylogin($author_name);
else :
$curauth = get_userdata(intval($author));
endif;
?>

I used:

<?php
if(isset($_GET[‘author_name’])) :
$curauth = get_userdata(intval($author));
else :
$curauth = $wpdb->get_row(“SELECT * FROM $wpdb->users WHERE user_nicename = ‘$queried_name'”);
endif;
?>

Glad you got it sorted! I was waiting for someone else to give an opinion on this as I was clueless.