Please check the grafana log. Both errors probably have the same origin: You checkmk instance is not reachable from grafana.
Are you using a self-signed certificate? You need to add this certificate to your system CA certificates.
Please check the grafana log. Both errors probably have the same origin: You checkmk instance is not reachable from grafana.
Are you using a self-signed certificate? You need to add this certificate to your system CA certificates.