814:session_start(): ps_files_cleanup_dir: opendir(/var/lib/php/session) failed: Permission denied (13)

814:session_start(): Cannot send session cache limiter - headers already sent (output started at /var/www/vhosts/177/271051/webspace/httpdocs/buutvrij.info/wp-content/plugins/redi-restaurant-reservation/redi-restaurant-reservation.php:301)