如何使用REST_Controller到HMVC结构

Question

I working with HMVC Model in PHP (CodeIgniter) But how gonna to Fix this?

i use Library from Here But still the same error

Please Someone help me...

The error is like this :

My Screen

*. My Controllers

<?php

use Restserver\Libraries\REST_Controller;

defined('BASEPATH') OR exit('No direct script access allowed');

require(APPPATH . 'libraries/REST_Controller.php');
require(APPPATH . 'libraries/Format.php');

class nelayan extends REST_Controller
{
    public function __construct()
    {
        parent::__construct();
    }

    public function index_get()
    {
        $response['status'] = 200;
        $response['error'] = false;
        $response['message'] = 'Hai from response';

        $this->response($response);
    }
}