Fatal error: Uncaught Error: Interface 'Illuminate\Contracts\Mail\Mailer' not found in C:\xampp\htdocs\admin\vendor\laravel\framework\src\Illuminate\Mail\Mailer.php:20 Stack trace: #0 {main} thrown in C:\xampp\htdocs\admin\vendor\laravel\framework\src\Illuminate\Mail\Mailer.php on line 20