Fatal error: Uncaught Error: Interface 'Illuminate\Contracts\Mail\Mailer' not found in E:\xampp\htdocs\key1\vendor\laravel\framework\src\Illuminate\Mail\Mailer.php:17 Stack trace: #0 {main} thrown in E:\xampp\htdocs\key1\vendor\laravel\framework\src\Illuminate\Mail\Mailer.php on line 17