Aspose.Slides can`t read this presentation,I left the source file here,please check it

                    Aspose.Slides.Presentation ppt = new Aspose.Slides.Presentation(filePath);
                catch(Exception ex)

                } (773.4 KB)
please check it, this is the source file,

I have worked with source code and presentation file shared by you using Aspose.Slides for .NET 17.7 and have been able to observe the issue. A ticket with ID SLIDESNET-39214 has been created in our issue tracking system to further investigate and resolve the issue. This thread has been linked with issue so that you may be automatically notified once issue will be fixed.

We are sorry for your inconvenience,