Legends not showing up for charts

Describe the bug From the example images, I can see that the charts have some form of legend. These, however, don't show up when writing my own code or when trying to clone this repo and running that.

Screenshot options config generated chart

How to reproduce clone the repo, npm install, npm start

Additional context Another issue showed me that this project is abandoned in a way, and this is possibly not a priority to fix. If you know of some quick fix that'd be very helpful.