Fatal error: Uncaught Error: Class "Bitrix\Main\Diag\Logger" not found in D:\ktt\ttepla.com\public_html\bitrix\modules\calendar\lib\sync\util\databaselogger.php:9 Stack trace: #0 {main} thrown in D:\ktt\ttepla.com\public_html\bitrix\modules\calendar\lib\sync\util\databaselogger.php on line 9