Fatal error: Uncaught Error: Class "Webkul\Admin\Mail\Mailable" not found in /var/www/html/packages/Webkul/Admin/src/Mail/Customer/RegistrationNotification.php:11 Stack trace: #0 {main} thrown in /var/www/html/packages/Webkul/Admin/src/Mail/Customer/RegistrationNotification.php on line 11