Resolve Conflict When Using Highchart and Highmap together (TypeError: ma is not a function)

Instead of highmaps, you need to use map.js module.

<script src="//code.highcharts.com/maps/modules/map.js"></script>

Here is the documentation on using both together.

You must include this script tag after highcharts.js:

<script src="https://code.highcharts.com/maps/modules/map.js"></script>