How to send files via CEvent::Send only sends 1 file?

Question

1C-Bitrix

Good, tell me the error. The form should send files to the mail, but for some reason only 1 file comes. The data goes through ajax.

<form id="mailForm" enctype="multipart/form-data" accept-charset="UTF-8">
        <input id="email" class="email form-control" placeholder="<?=GetMessage('FORM3');?>" type="email"><br>
        <input id="name" class="name form-control" placeholder="<?=GetMessage('FORM4');?>" type="text"><br>
        <input id="phone_1" class="phone form-control" placeholder="+7 (___) ___ __ __" type="phone"><br>
        <input type="hidden" value="<?echo SITE_ID;?>" id="csite" name="csite">
        <input type="hidden" value="<?echo SITE_SERVER_NAME;?><?echo $APPLICATION->GetCurPage();?>" id="link" name="link">
        <textarea style="display: block; width: 100%;" id="message" name="message form-control" placeholder="<?=GetMessage('FORM5');?>" rows="8" cols="80"></textarea><br>
        <input id="file" name="file" type="file" multiple="multiple" /><br> <!--name="file[]"-->
        <button type="button" id="sendMail" name="button" style="cursor: pointer;" class="btn btn-outline-success btn-success"><?=GetMessage('FORM6');?></button>
      </form>

//собираем файлы из загрузки в массив .
  $files=array();
    foreach ($_FILES as $file){
      if (!empty($file['tmp_name'])) {
          $files[]=CFile::SaveFile($file,'form');
        }
    }

    $mess = CEvent::Send("FORMA", $SITE, array(
                "EMAIL" => $email,
                 "NAME" => $name,
                 "PHONE" => $phone_1,
                 "LINK" => $link,
    "DATA" => $data,
    "MESSAGE" => $message
                ), 'Y','',$files);
        echo $mess;