Fatal error: Uncaught Error: Class "Illuminate\Support\ServiceProvider" not found in C:\xampp\htdocs\vendor\itsgoingd\clockwork\Clockwork\Support\Laravel\ClockworkServiceProvider.php:16 Stack trace: #0 {main} thrown in C:\xampp\htdocs\vendor\itsgoingd\clockwork\Clockwork\Support\Laravel\ClockworkServiceProvider.php on line 16