below is the working fiddle of map chart,
https://jsfiddle.net/fL24s8z0/
same data i'm trying to export as a image from export server. I had given y when its asked 'Include Maps? (requires Maps license): ' during installation.
Geojson is included in map data itself. it working fine in fiddle but its blank in exportserver.
using highcharts 9.0.0 version