Fatal error: Uncaught Error: Class "Illuminate\Database\Seeder" not found in /home/koreken1/deneme.korekenkadir.com.tr/database/seeders/DemoDataSeeder.php:12 Stack trace: #0 {main} thrown in /home/koreken1/deneme.korekenkadir.com.tr/database/seeders/DemoDataSeeder.php on line 12