Grafana relative time range do not work

Grafana relative time range do not work (Latest 1h, etc…). When select an option, nothing happens.

Our grafana server meant to be used for testing and for the graphs shown on our map.
We can’t “allow” free choise of time ranges as this would generate too much load on our servers.

Ok, I understand. It was strange, because there is an option in menu, but don’t work.