Fatal error: Uncaught Error: Class "Illuminate\Database\Seeder" not found in C:\xampp\htdocs\datatablecolcolor\Laravel-Datatables-Column-Colors\database\seeds\RoleUserTableSeeder.php:6 Stack trace: #0 {main} thrown in C:\xampp\htdocs\datatablecolcolor\Laravel-Datatables-Column-Colors\database\seeds\RoleUserTableSeeder.php on line 6