Fatal error: Uncaught Error: Class "Bitrix\Im\Integration\UI\EntitySelector\ChatProvider" not found in D:\ktt\ttepla.com\public_html\bitrix\modules\im\lib\integration\ui\entityselector\chatuserprovider.php:19 Stack trace: #0 {main} thrown in D:\ktt\ttepla.com\public_html\bitrix\modules\im\lib\integration\ui\entityselector\chatuserprovider.php on line 19