I just updated my Debian Grommunio install and got these messages in the php-fpm7.4 log:
[04-Jan-2023 10:37:19] WARNING: [pool grommunio-sync-pool] child 952 said into stderr: "NOTICE: PHP message: PHP Warning: Use of undefined constant LOGBACKEND_CLASS - assumed 'LOGBACKEND_CLASS' (this will throw an Error in a future version of PHP) in /usr/share/grommunio-sync/lib/core/slog.php on line 118"
[04-Jan-2023 10:37:19] WARNING: [pool grommunio-sync-pool] child 952 said into stderr: "NOTICE: PHP message: The configured logging class `LOGBACKEND_CLASS` does not exist. Check your configuration."
[04-Jan-2023 10:37:19] WARNING: [pool grommunio-sync-pool] child 952 said into stderr: "NOTICE: PHP message: The configured logging class `LOGBACKEND_CLASS` does not exist. Check your configuration."
Anybody to know, what I can do, other than rolling my snapshot back?