NR+influxdb+grafan

Hi, i try to connect NR+influxdb+grafana (in order to store sensor data), but when i get to grafana Data Sources setup, i have this error. I think i completed all requirements, like URL, user, pass, etc…
Any help?

That could be a lot of things, including your local internet or other system issues.

I fix that problem, but i have new one:

When i get to grafana dashboard I can’t get any data from my sensors to the dashboard, what this error could mean ?


Any help, please? What i have to do?