php 404 bug

Hi,

We receive this php error in our debug log whenever a page is 404 using this theme:

[02-Dec-2025 19:15:14 UTC] PHP Deprecated: strlen(): Passing null to parameter #1 ($string) of type string is deprecated in /sites/website/files/wp-content/themes/rife-free/header-variants/horizontal-one-line.php on line 30

Each time we upgrade the theme, I have to go in and add an isset($show_header_at) && !empty($show_header_at) check on the line, before using strlen, to quiet this error.

If this could be patched, that would be great.

Thank you.