Fatal error: Uncaught Error: Class "Illuminate\Database\Seeder" not found in /opt/lampp/htdocs/tsipu/database/seeders/RealDataNonPeriodicSeeder.php:26 Stack trace: #0 {main} thrown in /opt/lampp/htdocs/tsipu/database/seeders/RealDataNonPeriodicSeeder.php on line 26