Добавка елемента в инфоблок и отправка сообщения на почту AJAX битрикс

script.js

$(document).on("click", '#subscribe_submit', function(e) {
    e.preventDefault();
    var parent = $(this).parent();
      $.ajax({
          url: '/local/ajax/subscribe.php',
          data: {
            mail: parent.find('input[name="mail"]').val(),
        },
        dataType: 'json',
          success: function(result){
              if(result.error){
                  alert(result.error);
              }else{
                   alert(result.sendMsg);
              }
          }
      });
});

subscribe.php

<?define("NO_KEEP_STATISTIC", true);?>
<?define("NOT_CHECK_PERMISSIONS", true); ?>
<?define("NEED_AUTH", true); ?>
<?require($_SERVER["DOCUMENT_ROOT"]."/bitrix/modules/main/include/prolog_before.php"); ?>
<?
use Bitrix\Main\Mail\Event;
use Bitrix\Highloadblock as HL;
use Bitrix\Main\Entity;
use Bitrix\Main\Context;
use Bitrix\Main\Config\Option;
CModule::IncludeModule("iblock");
$request = Context::getCurrent()->getRequest();
$mail = $request->get("mail");
if($mail){
    $el = new CIBlockElement;
    $PROP = array();
    $PROP['MAIL'] = $mail;
    $arLoadProductArray = Array(
      "MODIFIED_BY"    => $USER->GetID(),
      "IBLOCK_ID"      => 3,
      "PROPERTY_VALUES"=> $PROP,
      "NAME"           => $mail,
      "ACTIVE"         => "Y"
      );
    if($PRODUCT_ID = $el->Add($arLoadProductArray))
      $result['elementId'] = $PRODUCT_ID;
    else
       $result['error'] = $el->LAST_ERROR;
        //отправка почты админу
      	$arEventFields= array(
      		"MAIL" => $name
      			);
      if($msg = CEvent::Send("SUBSCRIBE", SITE_ID, $arEventFields, "N", 48)){
          $result['sendMsg'] = "Подписка успешно оформлена";
      }else{
         $result['sendMsg'] = "Ошибка, попробуйте еще раз";
      }
}else{
    $result['error'] = "Заполните пустые поля";
}
exit(json_encode($result));