We are using Group Docs Viewer for .NET 16.10.0. We are unable to view the attached pdf in the zip file using the same. Can you verify this and provide a solution for the same.
We have successfully reproduced your reported issue at our end. The issue has been logged in our Issue Tracking System with ID: VIEWERNET-1026. We shall further do the investigations on it and once we have any information related to this issue, we’ll inform you via this forum thread.
As a side note, GroupDocs.Viewer for .NET 16.11.0 is available for download and we would recommend you to use this latest version for a better experience.