The file uploads successfully to localhost, but it cannot work on the server using CI

When I try to upload image files to localhost, they are stored in DB and I can read these uploaded images, but when I upload the code to the server via FTP, it said an error like this:

• This page doesn't work.
• Blablabal.com is currently unable to process this request.
• HTTP ERROR 500

Is it because my php version on localhost is different from the PHP version on the server?

Can anyone help me? Thanks mate

My controller

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

class News extends CI_Controller {
function __construct() {
    parent::__construct();
    $this->load->model('news_model');
        $this->load->helper(array('form', 'url'));
    $this->load->library('session');
}

    public function index()
{
$data['datax'] = $this->news_model->tampil_data()->result();
$data['viewx']="news/content";
$this->load->view('template/header');
$this->load->view('template/main',$data);
  //$this->load->view('news/content');
  $this->load->view('template/footer');
}

    function tambah(){
$data['title'] = "Tambah news";
$data['updateid'] = '';
$data['update'] = '';
$data['viewx']="news/form";
$this->load->view('template/header');
$this->load->view('template/main',$data);
  //$this->load->view('news/content');
  $this->load->view('template/footer');

    }

    function tambah_aksi(){
        //upload
          // $this->load->library('upload');
          $this->load->library('upload');
        $nmfile = "file_".time(); //nama file saya beri nama langsung dan diikuti fungsi time
        $config['upload_path'] = './../assets/'; //path folder
        $config['allowed_types'] = 'gif|jpg|png|jpeg|bmp'; //type yang dapat diakses bisa anda sesuaikan
        $config['max_size'] = '2048'; //maksimum besar file 2M
        $config['max_width']  = '1288'; //lebar maksimum 1288 px
        $config['max_height']  = '768'; //tinggi maksimu 768 px
        $config['file_name'] = $nmfile; //nama yang terupload nantinya
        $this->upload->initialize($config);

        if($_FILES['images']['name'])
        {
            if ($this->upload->do_upload('images'))
            {
                $gbr = $this->upload->data();
               // $data = array(
               //   'nm_gbr' =>$gbr['file_name'],
               //   'tipe_gbr' =>$gbr['file_type'],
                //  'ket_gbr' =>$this->input->post('textket')
                //);

                 //akses model untuk menyimpan ke database
                        $data = array();
                        //insert
                        $judul = $this->input->post('judul');
                        $news = $this->input->post('news');
                        $imagess = $this->input->post('images');
                        $data = array(
                        'title' => $judul,
                            'detail' => $news,
                            'images' => $gbr['file_name']
                         );
                        $this->news_model->input_data($data,"news");
                //pesan yang muncul jika berhasil diupload pada session flashdata
                $this->session->set_flashdata("pesan", "<div class=\"col-md-12\"><div class=\"alert alert-success\" id=\"alert\">Upload gambar berhasil !!</div></div>");
                redirect('news/'); //jika berhasil maka akan ditampilkan view vupload
            }else{
                //pesan yang muncul jika terdapat error dimasukkan pada session flashdata
                $this->session->set_flashdata("pesan", "<div class=\"col-md-12\"><div class=\"alert alert-danger\" id=\"alert\">Gagal upload gambar !!</div></div>");
                redirect('news/tambah'); //jika gagal maka akan ditampilkan form upload
            }
        }
    }

      

        
        
        
      

    

I am trying to change my php version and this is what I got

An unrelated exception was caught

Type: error

Message: Call to undefined function finfo_open ()