phpmyadmin error

i've follow this : article but the result are, is there something that i miss ?

Error during session start; please check your PHP and/or webserver log file and configure your PHP installation properly. Also ensure that cookies are enabled in your browser.

session_start(): open(SESSION_FILE, O_RDWR) failed: No such file or directory (2)

session_start(): Failed to read session data: files (path: /var/lib/php/session)