Fatal error: Uncaught Error: Class "Illuminate\Support\ServiceProvider" not found in C:\xampp\htdocs\hannoole\PMS\vendor\laravel-notification-channels\onesignal\src\OneSignalServiceProvider.php:9 Stack trace: #0 {main} thrown in C:\xampp\htdocs\hannoole\PMS\vendor\laravel-notification-channels\onesignal\src\OneSignalServiceProvider.php on line 9