Grafana with prometheus


I’m using Grafana on Rocky 9 - Version 9.5.1. Installed it a few days ago.
Prometheus is getting the metrics from a windows 10 host but I can not get the metrics displayed in Grafana.
I’ve added the data source, then I go to Connections → Your connections, I click Build a dashboard of the relative host but I get Panel plugin not found: undefined.
I’ve also tried using the 'Create your first dashboard’ tile → Add visualization —> but I do not see any data and when I click on the 'Select metric’ drop-down menu, there are no 'No options found’.
Host and server (running Grafana) are using the same NTP server and are in sync.

I don’t know what I am doing wrong. Please advise, if you can.

Thank you