Cannot save Dashboard with Item Value widgets

[Arvyr]

Hello,

I have a problem with my dashboard.
Whenever I add a single item value widget to the Global View or too many of these widgets to a custom dashboard, I get the following error:

JSON array input is expected.
Field "name" is mandatory.
Field "userid" is mandatory.
Field "display_period" is mandatory.
Field "auto_start" is mandatory.

I run zabbix (vm with 4 cpu cores and 8GB ram) on a current AlmaLinux 9.5 with
zabbix-server 7.2.6
mariadb 11.4
nginx 1.25
php-fpm 8.0.30
SELinux is in permissive mode

Is this a known bug? Is there a solution for this or is here a limitation to this specific widget that I'm unaware of?
I already raised the memory_limit as mentioned in another post, but that didn't help.

See attached image below:
(I can save this dashboard if I delete any of the widgets there, so I seem to hit some kind of limitation)

[Arvyr]

After updating to 7.2.7 it worked without any issues.
It seems however, it had nothing to do with Zabbix itself.
Looks like the /etc/fstab was faulty, the entry for /tmp specifically.
Fixed that and now everything works as expected.

I consider this issue to be solved.

[markfree]

Check if you have a low PHP memory limit, which is the maximum amount of memory a script may consume. If I'm not mistaken, it's 128MB by default. Your environment may need a bit more.

[Arvyr]

As already mentioned in my initial post, I already tried that to no avail.
I set it to 2G and also doubled or quadrupled the other values as well.

[Arvyr]

Just as an addition, I set up another test instance with RockyLinux 9.5, PostgreSQL 17, Apache2 2.4.62 and Zabbix 7.2.6 with the same result.
I hit a limit at 18-20 unit value widgets.

[Arvyr]

After updating to 7.2.7 it worked without any issues.
It seems however, it had nothing to do with Zabbix itself.
Looks like the /etc/fstab was faulty, the entry for /tmp specifically.
Fixed that and now everything works as expected.

I consider this issue to be solved.