Fatal error: Uncaught Error: Class "Bitrix\Main\Loader" not found in D:\ktt\ttepla.com\public_html\bitrix\modules\mail\lib\integration\calendar\ical\icalmailmanager.php:12 Stack trace: #0 {main} thrown in D:\ktt\ttepla.com\public_html\bitrix\modules\mail\lib\integration\calendar\ical\icalmailmanager.php on line 12