I am trying to install the Popularity Contest Plugin from alexking.org.
When I want to activate the plugin I get following message:
Plugin could not be activated because it triggered a fatal error.
Warning: Unknown(): open(/var/php_sessions/sess_613c168fb6651d27c5cc2309400b4d2f, O_RDWR) failed: No such file or directory (2) in Unknown on line 0
Warning: Unknown(): Failed to write session data (files). Please verify that the current setting of session.save_path is correct (/var/php_sessions) in Unknown on line 0