Fatal error: Uncaught Error: Class 'Bitrix\Main\Page\Frame' not found in /var/www/tsby/data/www/t-s.by/buy/sect_popupcallback.php:2 Stack trace: #0 {main} thrown in /var/www/tsby/data/www/t-s.by/buy/sect_popupcallback.php on line 2