We have a number of customer Excel files that contain Microsoft Graph charts and attempting to open them with Aspose.Cells causes a null reference exception:
Thanks for your posting and using Aspose.Cells for .NET.
We have logged your issue in our database. We will look into it and throw the exception as per your posting. Once, the issue is resolved or we have some other update for you, we will let you know asap.
This issue has been logged as CELLSNET-41608.