js不起作用-控制器和js文件

我试图解决一个问题，但它不起作用。在控制器中，

我有这个代码，

public function sendFeedbackAjax() {
        $feedback = $this->params('feedback_textarea');
        $ip = $_SERVER['REMOTE_ADDR'];
        $to = 'sinemalar@nokta.com';
        $subject = 'Sinemalar Görüş Bildirimi';
        $message = 'URL: ' . $this->params('url') . '<br/><br/>E-posta adresi: ' . $this->params('feedback_email') . '<br/><br/>' . $feedback;
        $headers = 'MIME-Version: 1.0' . "'r'n" .
                'Content-Type: text/html; charset="UTF-8"' . "'r'n" .
                'From: noreply@sinemalar.com' . "'r'n" .
                'Reply-To: noreply@sinemalar.com' . "'r'n";
        $uid = $_SERVER['REMOTE_ADDR'] . 20;       
        $user = NCore::cache()->remoteCache->get($uid);

        if ($user != null) {
               $this->sendJSONResponse('Error');
        } else {
         NCore::cache()->remoteCache->set($uid, $ip, 60 * 60 * 24);
             mail($to, $subject, $message, $headers);
            $this->sendJSONResponse('OK');
        }
    }

它检查缓存服务器；如果有密钥，则发送$this->sendJSONResponse('Error');，否则发送$this->sendJSONResponse('OK');

但在JS方面，我尝试了这个：

$.ajax(
        {
            type: "POST",
            url: '/json/common/sendFeedbackAjax',
            data: "action=send&url="+url+"&"+values,
            success: function(response)
            {
                if(response == 'OK')
                {
                    $('#feedback_body').html('<p>Görüşleriniz alınmıştır, teşekkür ederiz.</p>');
                    setTimeout(function () {
                        hideFeedback();
                    },2000);
                }
                else
                {
                    $('#feedback_body').html('<p>Error</p>');
                }


        }

但它不起作用。原因可能是什么？