I placed your code at x-child/woocommerce/loop/no-products-found.php but it isn’t working. And yes, I have verified that the child theme is active.

I found the file and edited it, but it didn’t change anything. The text isn’t the same as what I see on the page. The code of the file:

<?php
/**
 * Displayed when no products are found matching the current query
 *
 * This template can be overridden by copying it to yourtheme/woocommerce/loop/no-products-found.php.
 *
 * HOWEVER, on occasion WooCommerce will need to update template files and you
 * (the theme developer) will need to copy the new files to your theme to
 * maintain compatibility. We try to do this as little as possible, but it does
 * happen. When this occurs the version of the template file will be bumped and
 * the readme will list any important changes.
 *
 * @see 	    https://docs.woocommerce.com/document/template-structure/
 * @author 		WooThemes
 * @package 	WooCommerce/Templates
 * @version     2.0.0
 */

if ( ! defined( 'ABSPATH' ) ) {
	exit; // Exit if accessed directly
}

?>
<p class="woocommerce-info"><?php _e( 'TEST No products were found matching your selection.', 'woocommerce' ); ?></p>

The space is gone now that I have removed code from my child theme that was causing an error as well. Nevermind!

I have updated the Core plugin but am still seeing the error at the top of my site in the backend. What is causing it? I don’t want ti simply turn off bug notices, as that won’t solve the root problem.

Realized that the header wise setting only applies to full width sites, not boxed. Wish this were more clear in the dashboard. Never mind my question. Thanks.

Thank you. Once the theme is updated, which stretch option should I choose to make it look right?