Aspose.pdf for python via .NET pdf to ppt conversion issue on Linux server

Getting error while converting pdf to ppt on my Red Hat Linux

Proxy error(NullReferenceException): Object reference not set to an instance of an object."

when my aspose.PptxSaveOptions() method called

Please note aspose.License and aspose.Document() method is working fine

While the aspose.PptxSaveOptions() working on my windows local enviornment

@sakshampefo

Can you please share your sample file with us so that we can test the scenario in our environment and address it accordingly?