I'm using the latest version of XDK on Windows 10 to build an HTML5 web app (not hybrid).
I was pushing new versions of my code to the server successfully to test the web app on iOS using App Preview.
Now when I start a push to the testing server the upload starts, but the progress bar only progresses a couple of bars, then quits.
The date and time shown for the last upload remain the same.
It seems to have damaged the previous version of the app on the server because it won't run in the App Preview at all.
I have re-started XDK and re-booted the computer. There is only one project shown in the project list.
William -- are you still experiencing this problem? It sounds like a temporary issue, the backend services are hosted by Amazon, and we occasionally see issues with that service that sound like what you're experiencing.