Fatal error: Uncaught Error: Class "Illuminate\Database\Seeder" not found in C:\xampp\htdocs\gnu_7\g7\database\seeders\NotificationDefinitionSeeder.php:22 Stack trace: #0 {main} thrown in C:\xampp\htdocs\gnu_7\g7\database\seeders\NotificationDefinitionSeeder.php on line 22