Fatal error: Uncaught TypeError: call_user_func_array(): Argument #1 ($callback) must be a valid callback, function "show_custom_out_of_stock_notice" not found or invalid function name in /www/attuality_462/public/wp-includes/class-wp-hook.php:324 Stack trace: #0 /www/attuality_462/public/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters('', Array) #1 /www/attuality_462/public/wp-includes/plugin.php(517): WP_Hook->do_action(Array) #2 /www/attuality_462/public/wp-content/themes/clotya/woocommerce/content-single-product.php(48): do_action('woocommerce_bef...') #3 /www/attuality_462/public/wp-includes/template.php(812): require('/www/attuality_...') #4 /www/attuality_462/public/wp-content/plugins/woocommerce/includes/wc-core-functions.php(285): load_template('/www/attuality_...', false) #5 /www/attuality_462/public/wp-content/themes/clotya/woocommerce/single-product.php(42): wc_get_template_part('content', 'single-product') #6 /www/attuality_462/public/wp-includes/template-loader.php(106): include('/www/attuality_...') #7 /www/attuality_462/public/wp-blog-header.php(19): require_once('/www/attuality_...') #8 /www/attuality_462/public/index.php(17): require('/www/attuality_...') #9 {main} thrown in /www/attuality_462/public/wp-includes/class-wp-hook.php on line 324