Fatal error: Uncaught Error: Class "Magento\Framework\Component\ComponentRegistrar" not found in /var/www/magento/html/app/code/BBNT/PageBuilderCountdownTimer/registration.php:5 Stack trace: #0 {main} thrown in /var/www/magento/html/app/code/BBNT/PageBuilderCountdownTimer/registration.php on line 5