Fatal error: Uncaught Error: Class "Bitrix\UI\EntitySelector\BaseProvider" not found in D:\ktt\ttepla.com\public_html\bitrix\modules\catalog\lib\v2\Integration\UI\EntitySelector\SectionProvider.php:10 Stack trace: #0 {main} thrown in D:\ktt\ttepla.com\public_html\bitrix\modules\catalog\lib\v2\Integration\UI\EntitySelector\SectionProvider.php on line 10