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