“session_start(): open(/var/lib/php/session/sess_s… failed: Permission denied” After enabling Nginx reverse proxy – Plesk 11.5.30 / CentOS 6.5

Got the following error right after I enabled Nginx reverse proxy on a Plesk box

centos 6.5 plesk 11.5.30 php session permission error denied

For us it was as simple as issuing the following to fix this error:

chmod 1733 -R session