I am trying to export an image of a gantt to insert it into a PDF.
I have been looking for an answer in different forums but I can't find the solution and when trying to use Highcharts Export Server it gives me the following error...
Error when processing chart: {"error":true,"message":"Only JSON configurations and SVG is allowed for this server.\n\n If you require JavaScript exporting, please consider hosting your own\n export server, as described here: https://github.com/highcharts/node-export-server.\n\n If this is your server, JavaScript exporting can be enabled by starting the server\n with the --allowCodeExecution flag.\n\n "}