Fatal error: Uncaught Error: Class "Bitrix\Main\ORM\Data\DataManager" not found in D:\ktt\ttepla.com\public_html\bitrix\modules\im\lib\model\chatpinnedmessage.php:42 Stack trace: #0 {main} thrown in D:\ktt\ttepla.com\public_html\bitrix\modules\im\lib\model\chatpinnedmessage.php on line 42