Fatal error: Uncaught Error: Class "Bitrix\Main\UI\Viewer\Transformation\Transformation" not found in D:\ktt\ttepla.com\public_html\bitrix\modules\main\lib\ui\viewer\transformation\document.php:10 Stack trace: #0 {main} thrown in D:\ktt\ttepla.com\public_html\bitrix\modules\main\lib\ui\viewer\transformation\document.php on line 10