[help] Unknown open path folder session ci !

[eluser]Unknown[/eluser]
I needed help. did not understand what is happening with the following error!

A PHP Error was encountered

Severity: Warning

Message: Unknown: open(/var/lib/php/session/sess_9fb7986976b52b23cb935becffd1a9ae, O_RDWR) failed: Permission denied (13)

Filename: Unknown

Line Number: 0
A PHP Error was encountered

Severity: Warning

Message: Unknown: Failed to write session data (files). Please verify that the current setting of session.save_path is correct (/var/lib/php/session)

Filename: Unknown

Line Number: 0

you can find at this:
http://test.alodacsan.com/admin/user/login.html

[eluser]kreamik[/eluser]
just make this folder writable : /var/lib/php/session/