Github ASP.NET MVC Demo is not working

Hi, I am new in GroupDocs components. I downloaded asp.net mvc demo from github link:
GitHub - groupdocs-viewer/GroupDocs.Viewer-for-.NET-MVC: Moved to https://github.com/groupdocs-viewer/GroupDocs.Viewer-for-.NET/tree/master/Demos/MVC
i opened the project in the zip file on vs2017. the project is compiling and running succesfully, i see the viewer on the page properly. but i got error on viewer.js when i upload any type of documents. i attach the error and example uploaded file for more information.
thanks,
Yusuf
innosa-logo.png (2.5 KB)
viewererror.PNG (42.1 KB)

@yusufbal35,

Thanks for contacting support.

We are able to reproduce your reported issue at our end. The issue has been logged in our GitHub issues as JavaScript Error: Cannot read property 'length' of undefined · Issue #16 · groupdocs-viewer/GroupDocs.Viewer-for-.NET-MVC · GitHub for further investigation. We shall keep you notified in case of any updates.

@yusufbal35,

Your reported issue, logged as JavaScript Error: Cannot read property 'length' of undefined · Issue #16 · groupdocs-viewer/GroupDocs.Viewer-for-.NET-MVC · GitHub, has been fixed. Please download the updated version of the application from GitHub repository.