[Solved] Session dont working - Class 'database' not found

Sorry, my mistake, this:
public $sessionDriver            = '\CodeIgniter\Session\Handlers\DatabaseHandler';

work fine, thanks a lot!

Hi how did you get it working? I get the same error "No database selected".

Code:

    //public $sessionDriver            = 'CodeIgniter\Session\Handlers\FileHandler';
    public $sessionDriver            = '\CodeIgniter\Session\Handlers\DatabaseHandler'; // I tried with or without backslash before Codeigniter.
    public $sessionCookieName        = 'mysession';
    public $sessionExpiration        = 7200;
    //public $sessionSavePath          = WRITEPATH . 'session';
    public $sessionSavePath          = 'ci_sessions';
    public $sessionMatchIP           = false;
    public $sessionTimeToUpdate      = 300;
    public $sessionRegenerateDestroy = false;