Firstly, This is excellent. I have used 2 graphs previously to track short term and long term CPU usage and this provides exactly what I was trying to achieve. Thank you.
I had a problem this morning, I am seeing this error when I edit the card:-
**Configuration errors detected:**
*** document.createElement(...).constructor.getConfigElement is not a function**
The card config which was working last night is as follows -
- entity: sensor.load_1m
- entity: sensor.processor_use_percent
title: CPU Load
Clearing the browser cache had no effect but a restart of HA seemed to resolve it so it could be an issue with my setup.
I will convert more of my graphs to plotly and let you know if anything else occurs.