When zabbix agent is unavailable latest data is blank page

[Fighter]

When my zabbix agent is unavailable, I can view in latest data historical data, but when it is unavailable for more than 24 hours, I see in latest data - only empty page - No data found. When connection to the agent is restored, I can see all data history again. Do you know where the interval is set after how many hours it will show me only a blank page? Thanks
Use zabbix 4.2.8

[solution]

for Zabbix 4.2 read:

https://www.zabbix.com/documentation/4.2/en/manual/web_interface/definitions

Wellington

[Fighter]

Thank you very much, it is solved