Grafana - PNP - Services are not populating

Hi

We have integrated Nagios core with Grafana using pnp.
We have made all the changes as described by nagios to integrate with grafana. The data source is getting connected. And the host is populating but the services are not populating in the drop down.
https://support.nagios.com/kb/article/nagios-core-performance-graphs-using-pnp4nagios-801.html
Grafana is not showing any errors and no errors in logs as well. We kind of thinking that this is something to do with pnp4nagios. We just wanted to know if there are any place where we can go and check the files for any changes.

Hi deepypro.
I’ve just followed the same article to get Grafana configured.
First I installed pnp4nagios on my NagiosServer and for most of my services y can see graphics in their respective URLs. When I configured the datasource, once i click on “test and save” it returned a “Data source is working” message.
Unfortunately once I try to populate the query , neither hostnames o services populates.
Did you manage to fix it?

Thank you in advance