Fatal error: Uncaught Error: Interface "Magento\Framework\Event\ObserverInterface" not found in /var/www/magento/html/app/code/BBNT/Wishlist/Observer/ControllerPredispatch.php:7 Stack trace: #0 {main} thrown in /var/www/magento/html/app/code/BBNT/Wishlist/Observer/ControllerPredispatch.php on line 7