Getting error in Codeigniter 3.1.4

"Unable to locate the specified class: Session.php"

Hello,
I am getting above error while adding "session" in auto load.
I am using hooks. so when I turn off hooks it is working fine.

+---- Hook Class-------+

Code:

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

class System extends CI_Controller {
}

Looks like the session library isn't loaded because autoloading is occurring after your hook.

I'd also recommend sticking to the latest available stable version which is version 3.1.3

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