Fatal error: Uncaught Error: Class "App\Http\Controllers\Controller" not found in /home/immunoglow/public_html/immunoglow/app/Http/Controllers/Admin/PresetDemoController.php:36 Stack trace: #0 {main} thrown in /home/immunoglow/public_html/immunoglow/app/Http/Controllers/Admin/PresetDemoController.php on line 36