Zabbix -Scheduled PDF Reports

[[email protected]]

Hello, I have a problem with generating reports after a Linux upgrade. So far it worked ok. the report is sent to the email as before but after opening the received pdf file I get a message
I did not change anything in the configuration the only thing is upgrade linux. Zabbix server and zabbix web service is running on a Linux Ubuntu 22.04 LTS virtual machine.
I do not really know how to solve this new reports also in the uploaded pdf file contain this message.

[[email protected]]

Ok, I found the problem but I can't solve it, it turns out that the problem is the guest account, which is disabled (until now it was also like this) after enabling the guest account and giving it admin privileges the report displays correctly. I just don't know why I need a guest account for the reports. In the report settings I have set another account as the owner and so far I have not changed anything. I haven't changed anything on the server itself either in web-service or zabbix-server configuration. There was also nothing about it in the various manuals on the subject of web-service configuration.