Fix all Grafana graphs with no data

Hello, i installed grafana according to this site and all hosts and services have no data
GitHub - chrisss404/icinga2-influxdb-grafana: Setup guide for Icinga2 with Grafana integration employing InfluxDB.

i don’t know where to start fixing the error can anyone give me a hint, thanks

You need to select hostname, service etc.

I have some master node services, or do I have to add client nodes to get the graph