Fatal error: Uncaught Error: Interface "Illuminate\Contracts\Mail\Mailable" not found in /home/salkanta/test.api.salkantay-trekking.com/vendor/illuminate/mail/Mailable.php:19 Stack trace: #0 {main} thrown in /home/salkanta/test.api.salkantay-trekking.com/vendor/illuminate/mail/Mailable.php on line 19