718:session_start(): ps_files_cleanup_dir: opendir(/tmp/.priv) failed: Permission denied (13)

718:session_start(): Cannot send session cache limiter - headers already sent (output started at /homepages/17/d216034577/htdocs/clickandbuilds/WordPress/Ctwelve/wp-content/plugins/redi-restaurant-reservation/redi-restaurant-reservation.php:276)