In laravel controller doesn't see ajax data via post, what's the problem?

Question

AJAX

Laravel 5.6 + JQuery

When sending a GET, returns a response with outgoing parameters, when changing the method to POST, Request::all() returns an empty array.
Everything works on OpenServer, but when transferred to a hosting it breaks.

What changed on the hosting:
- redirection from the root to public
- In the controller //use Illuminate\Http\Request; on use Request (on hosting, for some reason, it only worked like that);
- Registered X-CSRF-TOKEN.
- Threw accesses 777 on some folders for the test.

JS

$.ajaxSetup({
        headers: {
          'X-CSRF-TOKEN': $('meta[name="csrf-token"]').attr('content')
        }
    });

<... код не имеющий отношения к вопросу>

 $('[js_event=calc]').click(function(event) {
        //event.preventDefault();

        //options
        item = {};
        item['width'] = parseInt( $("[js_data=width]").val() );
        item['height'] = parseInt( $("[js_data=height]").val() );
        item['calc_name'] = $("[js_data=calc_name]").val();
        console.log( item['calc_name'] );

    console.log( $('meta[name="csrf-token"]').attr('content') );
    //item['_token'] = $('meta[name="csrf-token"]').attr('content') ; // в круг решил обмазаться для верности
    //item['_method'] = 'POST' ;
    
    $.ajax({
      url: '/calculation/json/',
      type: 'POST', // c GET работает !!!!!!!!!
      data: item,
          headers: { 'X-CSRF-Token': $('meta[name="csrf-token"]').attr('content') },
      success: function(resp){
            console.log( "submit form success" );
            console.log( resp );


      }
    });
    event.preventDefault();

    });

Controller

//use Illuminate\Http\Request;
use Request;

<... код не имеющий отношения к вопросу>

    public static function json2() {
    return print_r( Request::all(), true );
    //return print_r( Request::post(), true );
    //return json_encode( Request::all(), JSON_UNESCAPED_UNICODE );
    }