Hi There!
Great news, the update works (sort of) and you can see on there is a cursor which follows the mouse position on the elevation chart.
However, it seems there is no vertical indicator line on the elevation chart showing both distance and height. Is it something I am missing or just a small tweak to the code.
I noticed on your webpage (https://skirridsystems.co.uk/wordpress-plugins/os-datahub-maps/) it working well.
Thanks for such an excellent plugin.
Andy