Fatal error: Uncaught Error: Class 'Illuminate\Mail\Mailable' not found in C:\xampp\htdocs\secondary_sales1\app\Mail\RequisitionNotificationMailToCRM.php:10 Stack trace: #0 {main} thrown in C:\xampp\htdocs\secondary_sales1\app\Mail\RequisitionNotificationMailToCRM.php on line 10