Direct link rendered image not working, not sure how to troubleshoot

The error I get is:
Timeout error. You can set timeout in seconds with &timeout url parameter

I’ve attempted a timeout of 360 to the same effect. Debug level logs don’t seem to shed any light.

Currently on version

Grafana v6.0.0-beta1 (d7f81c4)

I would like to get a direct link to the D3 panel, but the bottom gauge would also be fine.