Why can't get query from sqlsrv ci3

//this my config db:

'dsn'   => '',
'hostname' => '10.***.***.*',
'username' => 'username',
'password' => 'password',
'database' => 'mydb',
'dbdriver' => 'sqlsrv',
'dbprefix' => '',
'pconnect' => FALSE,
'db_debug' => FALSE,
'cache_on' => FALSE,
'cachedir' => '',
'char_set' => 'utf8',
'dbcollat' => 'utf8_general_ci',
'swap_pre' => '',
'encrypt' => FALSE,
'compress' => FALSE,
'stricton' => FALSE,
'failover' => array(),
'save_queries' => FALSE

//my model

class Mod_login extends CI_Model{
function Aplikasi(){

    $sql = "SELECT * FROM aplikasi";
    $data = $this->db->query($sql);
    var_dump($data);
    die();
    if (!$data) {
        return false;
    } else {
        return $data;
    };
}

}

//and this is my controller

public function index()
{
    $logged_in = $this->session->userdata('logged_in');
    if ($logged_in == TRUE) {
        redirect('dashboard');
    } else {
        $aplikasi['aplikasi'] = $this->Mod_login->Aplikasi();
        $this->load->view('admin/login_data', $aplikasi);
    }
} 

hi, im newbie and have troble with my connection to sqlsrv, i already download extension for php 8.02, make it sure my username and pass cant access the table, but still cant get the result, its really depresing