functions.php

<?php

/*
 Theme Name:   Shopress Child
 Description:  Shopress Child Theme
 Author:       Linus Näslund
 Template:     shopress
 Version:      1.0.0
 Text Domain:  shopress-child
*/

function shopress_child_enqueue_styles() {
    wp_enqueue_style( 'parent-style', get_template_directory_uri() . '/style.css' );

}
add_action('wp_enqueue_scripts', 'shopress_child_enqueue_styles');

function shopress_force_404() {
  global $post, $wp_query;

  if(is_singular('product') || is_product_category()) {
    $wp_query->set_404();
    status_header(404);
  }
}
add_action('wp', 'shopress_force_404');