Fatal error: Uncaught Error: Class "Illuminate\Database\Seeder" not found in /home/demohost/hospital.demohost.in/database/seeders/DiagnosisCategorySeeder.php:8 Stack trace: #0 {main} thrown in /home/demohost/hospital.demohost.in/database/seeders/DiagnosisCategorySeeder.php on line 8