Demo Heatmap Code Yields Highcharts.mapChart is not a function

[GrantPayneDenver]

Describe the bug
Heatmap from demo doesn't display map.

To Reproduce
I copied the code in the demo.

I am running it locally in a Jupyter notebook. It all runs, but there is an error at the end.

When I run the final line, chart.display() I get this error report:

Something went wrong with the Highcharts.js script. It should have been automatically loaded, but it did not load for over 5 seconds. Check your internet connection, and then if the problem persists please reach out for support. (You can also check your browser's console log for more details.)

Detailed Error Message:
Highcharts.mapChart is not a function

Expected behavior
Display a demo heatmap as per demo link.

I believe that the Highcharts.mapChart is not a function is the actual relevant part here.

Your Environment:

• OS: [Mac Ventura 13.7.2]
• Python Version: [e.g. 3.12.8]
• Highcharts JavaScript Version: [
  highcharts-core 1.10.2 pypi_0 pypi
  highcharts-maps 1.7.1 pypi_0 pypi
  ]

Additional context
Add any other context about the problem here.