Error in the query database ?

Hi guys.
I'm running into me with the following error to list database data:
Link: http://build.elevsaude.com/
Would anyone help me? For I see no error in the code below:

Controller file:
public function index() {
// Model load
$this->load->model('Runcode_model');
// Method run
$data['links'] = $this->Runcode_model->links_list();
// View load
$this->load->view('runcode', $data);
}

Model file:
class Runcode_model extends CI_Model {
public $elev_opera_id;
public $elev_opera_date;
public $elev_opera_hours;
public $ws_safe_id;
public $elev_opera_name;
public $elev_opera_logo;
public $elev_opera_link;

public function __construct() { 
parent::__construct();
}

// metodo que lista links das operadoras:
public function links_list() {
$query = $this->db->get('elev_operators'); Line 19
return $query->result();
}
}

View Archive:
<?php endforeach;
foreach ($links as $view) {
echo '<a class="orators-links-strucs"><img src="assets/fgs/'. $view->elev_opera_logo .'" class="orators-links-zoom-strucs"></a>';
};
?>