특정 url 접속시 "errors/html/error_404.php" 파일을 보여주려고 하는데요.

$this->load->view('errors/html/error_404');  혹은 show_404();

위와같이 해주었는데 404페이지는 안나오고 아래의 에러메시지가 나옵니다.

페이지 이동하게 하려면 어떻게 해야 하나요?

Severity: Notice

Message: Undefined property: CI_Controller::$load

Filename: libraries/Form_validation.php

Line Number: 147

Backtrace:

File: /opt/lampp/htdocs/application/views/errors/html/error_404.phpLine: 5Function: __construct

File: /opt/lampp/htdocs/application/controllers/Main.phpLine: 21Function: view

File: /opt/lampp/htdocs/index.phpLine: 315Function: require_once

------------------------------------------------------------------------------------------------------------------

Type: Error

Message: Call to a member function helper() on null

Filename: /opt/lampp/htdocs/system/libraries/Form_validation.php

Line Number: 147

Backtrace:

File: /opt/lampp/htdocs/application/views/errors/html/error_404.phpLine: 5Function: __construct

File: /opt/lampp/htdocs/application/controllers/Main.phpLine: 21Function: view

File: /opt/lampp/htdocs/index.phpLine: 315Function: require_once