Cron Job - Not Running, Please help and explain

Hi, I setup a cron job, and it is sending the following errors: PHP Warning: session\_start(): open(/var/lib/php/session/sess\_l95g3016knh742ae81o472rkl6, O\_RDWR) failed: Permission denied (13) in /var/www/vhosts/[login to view URL]\[login to view URL] on line 2 PHP Notice: Undefined variable: userdata in /var/www/vhosts/[login to view URL] on line 160 PHP Warning: Unknown: open(/var/lib/php/session/sess\_l95g3016knh742ae81o472rkl6, O\_RDWR) failed: Permission denied (13) in Unknown on line 0 PHP Warning: Unknown: Failed to write session data (files). Please verify that the current setting of session.save_path is correct (/var/lib/php/session) in Unknown on line 0