Using Aspose.Cells for .Net, version 19.3 in order to convert charts from Excel to images will result in blank charts.
Method used: Aspose.Cells.Charts.Chart.ToImage(ImageOrPrintOptions options);
Please see attached code and sample ( AsposeChartToImage.zip (33.6 KB) )
in order to reproduce the issue.
The issue is reproduced for Funnel, Histogram and Box and Whisker chart types.