How works validation?

[zhalil]

Hi, my validation not working, i install laravel-data into clean laravel 10x,
i have example laravel-data class :
`
namespace App\Data;

use Spatie\LaravelData\Data;

class MyData extends Data
{
public string $data;
public string $content;
}
`

and simple api route :
Route::post('/test',function (\App\Data\MyData $data){ dd($data); });
if i send filled json to route it's normal works and return my dd data
{ "data":"123", "content": "123" }
but if i try to validate and send this json :
{ "content": "123" }
me just redirected into web route to /

my question is what am i doing wrong?
i watched a few videos, and they have everything the same as mine, but it works fine, I even tried to repeat the letter for the letter, but I get everything the same