Fatal error: Uncaught Error: Class "Bitrix\Catalog\v2\Sku\BaseSku" not found in D:\ktt\ttepla.com\public_html\bitrix\modules\catalog\lib\v2\Sku\SimpleSku.php:21 Stack trace: #0 {main} thrown in D:\ktt\ttepla.com\public_html\bitrix\modules\catalog\lib\v2\Sku\SimpleSku.php on line 21