Fatal error: Uncaught Error: Interface "Illuminate\Contracts\Mail\Mailer" not found in C:\xampp\htdocs\public\vendor\laravel\framework\src\Illuminate\Mail\Mailer.php:23 Stack trace: #0 {main} thrown in C:\xampp\htdocs\public\vendor\laravel\framework\src\Illuminate\Mail\Mailer.php on line 23