Sessions - Not Working

You are wrong about loading the session as a driver.
Just like before, it must be loaded as a library:

PHP Code:

$this->load->library('session'); 


Check the documentation for that.

The tricky part is configuring the session settings.
I didn't get it working with $config['sess_driver'] = 'files';
Therefore, I switched to $config['sess_driver'] = 'database';  and I added a ci_sessions table to my database.
No problems with sessions since then.

Just to add to this message re: database sessions. Database sessions were my first option, a have revamp the database columns and indexes to suit CI 3.0.0 as the documentation mentions and session were and are storing when I change my config to use the database, however reading the performance differences between Files against Database under high load, File sessions will out perform database session and since the website / platform I am creating will be under high load, database sessions aren't the way forward.