Fatal error: Uncaught Error: Class "Illuminate\Database\Seeder" not found in /opt/lampp/htdocs/appproject/database/seeders/CopyAmountToGrossAmountSeeder.php:8 Stack trace: #0 {main} thrown in /opt/lampp/htdocs/appproject/database/seeders/CopyAmountToGrossAmountSeeder.php on line 8