Compare
Fatal error: Uncaught Error: Undefined constant Yoast\WP\SEO\Config\Schema_IDs::WEBPAGE_HASH in /home/comromcom01/public_html/wp-content/plugins/wpseo-woocommerce/classes/woocommerce-schema.php:169 Stack trace: #0 /home/comromcom01/public_html/wp-includes/class-wp-hook.php(324): WPSEO_WooCommerce_Schema->change_product(Array, Object(WC_Product_Simple)) #1 /home/comromcom01/public_html/wp-includes/plugin.php(205): WP_Hook->apply_filters(Array, Array) #2 /home/comromcom01/public_html/wp-content/plugins/woocommerce/includes/class-wc-structured-data.php(364): apply_filters('woocommerce_str...', Array, Object(WC_Product_Simple)) #3 /home/comromcom01/public_html/wp-includes/class-wp-hook.php(324): WC_Structured_Data->generate_product_data(Object(WC_Product_Simple)) #4 /home/comromcom01/public_html/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters(NULL, Array) #5 /home/comromcom01/public_html/wp-includes/plugin.php(517): WP_Hook->do_action(Array) #6 /home/comromcom01/public_html/wp-content/themes/martfury/woocommerce/content-single-product.php(64): do_action('woocommerce_sin...') #7 /home/comromcom01/public_html/wp-includes/template.php(812): require('/home/comromcom...') #8 /home/comromcom01/public_html/wp-content/plugins/woocommerce/includes/wc-core-functions.php(284): load_template('/home/comromcom...', false) #9 /home/comromcom01/public_html/wp-content/plugins/woocommerce/templates/single-product.php(37): wc_get_template_part('content', 'single-product') #10 /home/comromcom01/public_html/wp-includes/template-loader.php(106): include('/home/comromcom...') #11 /home/comromcom01/public_html/wp-blog-header.php(19): require_once('/home/comromcom...') #12 /home/comromcom01/public_html/index.php(17): require('/home/comromcom...') #13 {main} thrown in /home/comromcom01/public_html/wp-content/plugins/wpseo-woocommerce/classes/woocommerce-schema.php on line 169