Fatal error: Uncaught Error: Class "Illuminate\Database\Eloquent\Collection" not found in /var/www/html/booking/vendor/laravel/framework/src/Illuminate/Notifications/DatabaseNotificationCollection.php:13 Stack trace: #0 {main} thrown in /var/www/html/booking/vendor/laravel/framework/src/Illuminate/Notifications/DatabaseNotificationCollection.php on line 13