Author tags not calling…

“This tag must be used within The Loop.”

As far as I know, it is within the loop. The codex states the same thing for time and date tags, they work just fine, and they all are in the same loop. Do I need to edit multiple loops? The one I have worked on is in archive.php. Should I place it in another location as well?
Thanks Beel.

A header at the top is not within the loop.

This is “The Loop”:

https://codex.www.ads-software.com/The_Loop

Well can anyone suggest another way of accoomplishing my goal? Why do the date and time tags return data if they are also not within the loop?

Thanks!

https://codex.www.ads-software.com/Author_Templates#Custom_Author_Template

“Why do the date and time tags return data if they are also not within the loop?“

A theme using tags in this way benefits from a certain leakiness in The Loop, in that many (though not all) post array values from the last post on the page are still extant.

Anyway, you could try ‘querying’ the last post object just above or before the sidebar code you list above:

<?php
$wp_query->post;
?>

If that fails, try a global scope:

<?php
global $post, $wp_query;
$wp_query->post;
?>

The link Beel provides offers more advice/alternatives.

Thanks everyone. I appreciate your help greatly.