Fatal error: Uncaught Error: Class "Illuminate\Database\Seeder" not found in /home/alldemosite/public_html/worldmind-apps/database/seeders/ClassMaterialSeeder.php:8 Stack trace: #0 {main} thrown in /home/alldemosite/public_html/worldmind-apps/database/seeders/ClassMaterialSeeder.php on line 8