Hi,
This seems to have something to do with the highcharts version. Version 7.0.3 works fine. You can try that by replacing the path with this: https://code.highcharts.com/7.0.3/highcharts. I am not sure why 8.2.0 does not work. Maybe you can try the method that I showed here: Using external JS libraries via webTemplate folder.
Kind regards,
Alexander
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