Fatal error: Uncaught Error: Interface "Illuminate\Contracts\Broadcasting\ShouldBroadcast" not found in C:\xampp\htdocs\cms-propay\app\Events\SmartOtpEvent.php:13 Stack trace: #0 {main} thrown in C:\xampp\htdocs\cms-propay\app\Events\SmartOtpEvent.php on line 13