I was (foolishly) playing around with the web page (without backing it up first - school boy error) and seem to have broken something.
Now, it is hardly critical, but it is annoying.
I’ve tried comparing what I have against the baseline code from github, but have not come up with what is wrong or what it takes to fix it.
Any advice would be appreciated.
As you can see in the screenshot, I’ve managed to screw up the chart legend.