Fatal error: Uncaught Error: Interface "Illuminate\Contracts\Validation\Rule" not found in C:\xampp\htdocs\adminlte3\vendor\laravel\framework\src\Illuminate\Validation 2\InvokableValidationRule.php:12 Stack trace: #0 {main} thrown in C:\xampp\htdocs\adminlte3\vendor\laravel\framework\src\Illuminate\Validation 2\InvokableValidationRule.php on line 12