PHP Notic SessionHandler

I am seeing this notice a lot and have changed all my permissions, anyone know what this is.

On this particular instance I am getting a timeout on the dashboard - which is super light as I am not showing anything there.

[2022-07-14 10:05:54] mautic.NOTICE: PHP Notice - SessionHandler::gc(): ps_files_cleanup_dir: opendir(/var/lib/php/sessions) failed: Permission denied (13) - in file /var/www/mautic/vendor/symfony/http-foundation/Session/Storage/Handler/StrictSessionHandler.php - at line 106 {"maxlifetime":1440} {"hostname":"mautic","pid":1433144}