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