@atkins-chrisw
It seems to be related to the order the pdfmake JS files are loaded. I'll fix it in the next release. In the mean time you can change /dashboards/web/js/loaderConfig.js so that in the shim section the amcharts/plugins/export/export part changes to
'amcharts/plugins/export/export': {
deps: ['amcharts/amcharts',
'amcharts/plugins/export/libs/blob.js/blob',
'amcharts/plugins/export/libs/fabric.js/fabric.min',
'amcharts/plugins/export/libs/FileSaver.js/FileSaver.min',
'amcharts/plugins/export/libs/jszip/jszip.min',
'amcharts/plugins/export/libs/pdfmake/vfs_fonts',
'amcharts/plugins/export/libs/xlsx/xlsx.min']
},
'amcharts/plugins/export/libs/pdfmake/vfs_fonts': {
deps: ['amcharts/plugins/export/libs/pdfmake/pdfmake.min']
},