Fatal error: Uncaught Error: Class "Illuminate\Database\Seeder" not found in /var/www/html/packages/Webkul/Installer/src/Database/Seeders/DatabaseSeeder.php:16 Stack trace: #0 {main} thrown in /var/www/html/packages/Webkul/Installer/src/Database/Seeders/DatabaseSeeder.php on line 16