Fatal error: Uncaught Error: Interface 'Flasher\Prime\Notification\NotificationInterface' not found in C:\xampp\htdocs\medical-pathway\vendor\php-flasher\flasher\Notification\Envelope.php:13 Stack trace: #0 {main} thrown in C:\xampp\htdocs\medical-pathway\vendor\php-flasher\flasher\Notification\Envelope.php on line 13