I have made this url below available on our test server.

If I add the site to  compatibility view settings, upload works fine.

I am testing wit the simple upload with progress. 

Please, ignore the certificate warrnings .

https://sipdocsdev.sipkema.nl/dev/net_cs/ 

https://sipdocsdev.sipkema.nl/dev/net_cs/samples/simple-upload.aspx