Fatal error: Uncaught Error: Call to undefined function is_checkout() in /var/www/web484/html/wordpress/wp-content/plugins/woo-checkout-field-editor-pro/checkout-form-designer.php:73 Stack trace: #0 /var/www/web484/html/wordpress/wp-includes/class-wp-hook.php(286): thwcfd_enqueue_scripts('') #1 /var/www/web484/html/wordpress/wp-includes/class-wp-hook.php(310): WP_Hook->apply_filters(NULL, Array) #2 /var/www/web484/html/wordpress/wp-includes/plugin.php(465): WP_Hook->do_action(Array) #3 /var/www/web484/html/wordpress/wp-includes/script-loader.php(2537): do_action('wp_enqueue_scri...') #4 /var/www/web484/html/wordpress/wp-includes/class-wp-hook.php(286): wp_enqueue_scripts('') #5 /var/www/web484/html/wordpress/wp-includes/class-wp-hook.php(310): WP_Hook->apply_filters(NULL, Array) #6 /var/www/web484/html/wordpress/wp-includes/plugin.php(465): WP_Hook->do_action(Array) #7 /var/www/web484/html/wordpress/wp-includes/general-template.php(2745): do_action('wp_head') #8 /var/www/web484/html/wordpress/wp-content/themes/screenr/hea in /var/www/web484/html/wordpress/wp-content/plugins/woo-checkout-field-editor-pro/checkout-form-designer.php on line 73