public function buildForm(FormBuilderInterface $builder, array $options)
    {
        $options = $builder->get('responsible_party_kana')->getOptions();
        $builder->add('responsible_party_kana', KanaType::class, []);
    }

The child with the name \"responsible_party_kana\" does not exist.","C:\\xampp\\htdocs\\eccube\\eccube-4.0.4\\vendor\\symfony\\form\\FormBuilder.php",121,"#0 C:\\xampp\\htdocs\\eccube\\eccube-4.0.4\\app\\Customize\\Form\\Extension\\ResponsiblePartyKana.php(18)...