Cacti

Go to Utilities -> System utilities -> php info tab and check:
Timezone Database
Default timezone
date.timezone

It seems that your php doesn't use correct timezone

tested, it seems that there is any bug. I will try to fix it soon

Have you got actual thold version? It is 1.8.1

please create feature request here
https://github.com/Cacti/cacti/issues/new/choose

I guess that is problem with white spaces in gueue names. If I remember correctly it is reported (and maybe fixed) issue

weird (for me, but I'm not ubuntu specialist). I have installed only phpX.Y versions on my server.

you can find packages with apt utility:
apt list --installed | grep -i php

Update all to php 8.x, restart webserver

1.1.2 was release in 2018. A lot of things have been changed and fixed.

Incompatibility can also be caused by Cacti or PHP versions.

Actual Reportit develop version needs cacti 1.2.11, so you can update.

You can create reports here Console -> Management -> Reports

I wil revise reportit plugin in few days

1.1.2 is last release but it isn't actual code. Go to https://github.com/cacti/plugin_reportit and use Green button "Code"

more errors:
1) SYSTEM STATS: Time:299.1216 - your poller doesn't finish on time. Check forums, it has been here many times. Until you fix this, all the graphs won't work
2) problem with email - set email correctly in Concole -> COnfiguration -> settings -> Mail/Reporting/DNS

we really need know few information:
1) which user starting poller (probably in cron)
2) ls -ald /path/to/cacti/rra
3) ls -al /path/to/cacti/rra | head -10

you have problem only with one device or any new added devices?

First - update reportit from actual develop branch https://github.com/Cacti/plugin_reportit