Fatal error: Uncaught Error: Class "Bitrix\Sale\Exchange\OneC\DocumentBase" not found in D:\ktt\ttepla.com\public_html\bitrix\modules\sale\lib\exchange\onec\paymentdocument.php:4 Stack trace: #0 {main} thrown in D:\ktt\ttepla.com\public_html\bitrix\modules\sale\lib\exchange\onec\paymentdocument.php on line 4