Gettimg 404 when Validating

For non-Worpress pages, when I use

<?php
require_once(“/home/.juice/luveme/luve-me.net/wp-blog-header.php”);?>
<?php get_header(); ?>
<?php get_footer(); ?>

To include my layout in the pages, everything works, but when I use a validator link @ w3c or when I use something that reads the screen to check the page for accessibility like the program at https://bobby.watchfire.com/, it returns a 404 for the page.

Example page: https://luve-me.net/ask-me/

If you want to know why it matters, it’s because I believe in accessibility, and try my best to do what is necessary to provide a fairly accessible site.