Session permission problem fix in Codeigniter

Follow the below steps:
1. Go to your application folder and create a folder named 'tmp'
2. Go to your config.php file and change the following lines:
$config['sess_driver'] = 'files';
$config['sess_cookie_name'] = 'ci_session';
$config['sess_expiration'] = 7200;
$config['sess_save_path'] = APPPATH . 'tmp';
$config['sess_match_ip'] = FALSE;
$config['sess_time_to_update'] = 300;
$config['sess_regenerate_destroy'] = FALSE;

You are done.