Errors uploading a catalog from 1s to Bitrix, how to solve?

Question

1C-Bitrix

Greetings.
The essence of the problem. Deployed a site backup on a local computer. I set up unloading a catalog from 1s.
When starting the exchange, errors appear:

Выгружено товаров: 16
Выгружено картинок: 18
Выгружено файлов: 0
Выгружено предложений: 16
Произошла ошибка на стороне сервера. Получен неизвестный статус импорта.
Обмен не выполнен
Ответ сервера:
<table cellpadding="1" cellspacing="0" width="35%" bgcolor="#9C9A9C">
  <tr>
    <td><table cellpadding="5" cellspacing="0" width="100%">
      <tr>
        <td bgcolor="#FFFFFF" align="center">
          <FONT face="Verdana, Arial, Helvetica, sans-serif" size="-1">
          <font color="#FF0000"><b>DB query error.</b></font><br>
          Please try later.
          </font><br>
                      </form>
            <form method="post" action="/bitrix/admin/site_checker.php?tabControl_active_tab=edit5#edit5">
                            <input type="hidden" name="last_error_query" value="">
              <input type="hidden" name="sessid" id="sessid" value="f924333423594f9daa65e7a2fee8a172" />							<input type="submit" value="Send error report to support">
            </form>
                  </td>
      </tr>
    </table></td>
  </tr>
</table>
<br><br><br>

Выгрузка товаров завершена с ошибками!!!

The error appears quickly, within about 2-5 minutes.
What could be the problem, where to dig, php.ini or some other settings?