Laravel: /resource gives 403 Forbidden

I want to create the url my-domain.dev/resources so I added this to my Route file:

Route::get('/resources', function(){
  dd('hi');
});

However, this is not working. I only get a 403 Forbidden error:

All other routes are working fine. Is it not possible to set this route in Laravel 5.5 ?

via Chebli Mohamed