The attachment is not rendering in GroupDocs Viewer. I tried different versions and with the latest version, is still giving errors.
Thanks for sharing your issue with us.
We have successfully reproduced your reported issue at our end. We have logged the issue in our Issue Tracking System with ID: VIEWERNET-922. We shall further investigate this issue and once we get any update, we’ll notify you here.
In case of any confusion, please feel free to let us know.
We are happy to inform you that the fix will be available in the next monthly release which is GroupDocs.Viewer for .NET 3.8.0. Once version 3.8.0 is released, you will get a notification here.
In case of any further questions, please feel free to let us know.