Fatal error: Uncaught Error: Class "Illuminate\Mail\Mailable" not found in C:\xampp\htdocs\uslwmcbil_api\app\Mail\InvRegistrationOtpMailSender.php:9 Stack trace: #0 {main} thrown in C:\xampp\htdocs\uslwmcbil_api\app\Mail\InvRegistrationOtpMailSender.php on line 9