Fatal error: Uncaught Error: Interface 'Illuminate\Contracts\Validation\Rule' not found in D:\xampp\htdocs\psp\backend\vendor\laravel\framework\src\Illuminate\Validation\Rules\Enum.php:8 Stack trace: #0 {main} thrown in D:\xampp\htdocs\psp\backend\vendor\laravel\framework\src\Illuminate\Validation\Rules\Enum.php on line 8