Fatal error: Uncaught Error: Call to undefined function wc_wp_theme_get_element_class_name() in /production/wp-content/plugins/yith-woocommerce-wishlist/includes/class-yith-wcwl-add-to-wishlist-button.php:927 Stack trace: #0 /production/wp-content/plugins/yith-woocommerce-wishlist/includes/class-yith-wcwl-add-to-wishlist-button.php(911): YITH_WCWL_Add_To_Wishlist_Button::get_data_to_localize() #1 /production/wp-content/plugins/yith-woocommerce-wishlist/includes/class-yith-wcwl-shortcode.php(50): YITH_WCWL_Add_To_Wishlist_Button::maybe_register_scripts() #2 /production/wp-includes/class-wp-hook.php(324): YITH_WCWL_Shortcode::register_gutenberg_blocks('') #3 /production/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters(NULL, Array) #4 /production/wp-includes/plugin.php(517): WP_Hook->do_action(Array) #5 /production/wp-settings.php(704): do_action('init') #6 /production/wp-config.php(91): require_once('/production/wp-...') #7 /production/wp-load.php(50): require_once('/production/wp-...') #8 /production/wp-blog-head in /production/wp-content/plugins/yith-woocommerce-wishlist/includes/class-yith-wcwl-add-to-wishlist-button.php on line 927