Failed to initialize storage module

[ionesculiviucristian]

Hello. I'm having this warning when accessing the app:

A PHP ERROR WAS ENCOUNTERED
SEVERITY
Warning

MESSAGE
session_start(): Failed to initialize storage module: user (path: /var/www/html/application/config/../../storage/sessions)

FILENAME
Session/Session.php

LINE NUMBER
127

If I change the permissions to 0777 for storage it works (or point to /tmp in config).