Fatal error: Uncaught Error: Interface 'Illuminate\Contracts\Mail\Mailable' not found in D:\xampp\htdocs\psp\backend\vendor\laravel\framework\src\Illuminate\Mail\Mailable.php:22
Stack trace:
#0 {main}
thrown in D:\xampp\htdocs\psp\backend\vendor\laravel\framework\src\Illuminate\Mail\Mailable.php on line 22