report4.php "Reports -> Notifications" not working HTTP ERROR 500 (Zabbix 7.4.5)

[SZ_CGT]

Hi All
I have found just now, but I don't know since when is not working, the page /zabbix/report4.php of my server Zabbix v7.4.5 is not working (I'm accessing as Admin Zabbix, so it's not a problem of permissions)
I needed to modify a set of notifications or report but I recieve "white page" HTTP Error 500

Any Idea?

Thanks
Simone

[AlexeyBrizgalov]

Hello,
This is probably a web server issue. Are you using nginx or apache2? Any errors visible in web server error log?
One possibility might be that you are hitting memory limit, in which case you need to increase it in php.ini file.