Fatal error: Uncaught Error: Class "Magento\Catalog\Model\Attribute\Config\Reader" not found in /var/www/magento/html/generated/code/Magento/Catalog/Model/Attribute/Config/Reader/Proxy.php:7 Stack trace: #0 {main} thrown in /var/www/magento/html/generated/code/Magento/Catalog/Model/Attribute/Config/Reader/Proxy.php on line 7