Grafana rendered image fails some time

OK, then I’ve got the following questionnaire;

Information on it here.

  • the image-URL (Grafana) is HTTP, no HTTPs (in relation to " Certificate signed by internal certificate authorities")?
  • which Grafana-version do you have? (in relation to “PhantomJS” - there’s now a “Grafana Image Renderer plugin or remote rendering service”)

If I remember correctly there was a topic on this here from end of last year…
EDIT: here is @rlkoshak post