Traffic Lights panel not rendering


I am using the ‘Traffic Lights’ panel download from but it is not rendering.

I get the following error:
error getting panel {Id:20 Type:snuids-trafficlights-panel Title:Windows Services Status GridPos:{H:10 W:24 X:0 Y:20}}: Error obtaining render: 500 Internal Server Error

Could someone please have a look at this ?

thank you,

Latest error from CLI:

t=2020-11-17T18:42:12+0200 lvl=eror msg=“Request Completed” logger=context userId=1 orgId=1 uname=admin method=GET path=/render/d-solo/6Qnlqj2Gz/zabbix-server-dashboard status=500 remote_addr= time_ms=62006 size=1783 referer=“
t=2020-11-17T18:42:12+0200 lvl=eror msg=“Render request failed” logger=plugins.backend pluginId=grafana-image-renderer url=“http://localhost:3000/d-solo/6Qnlqj2Gz/zabbix-server-dashboard?orgId=1&from=1605627731040&to=1605631331040&panelId=6&width=1000&height=500&tz=Europe%2FAthens&render=1” error=“TimeoutError: waiting for function failed: timeout 60000ms exceeded”