An Error Was Encountered
In order to use the Session class you are required to set an encryption key in your config file.
setelah saya googlening teryata error terdapat di
buka file aplication/ config.php
cari ini
$config['encryption_key'] = '';
terus tinggal tambahkan
$config['encryption_key'] = 'disini apa sajah ';
yes berhasil keprok tangan pemirsa :DD
