I have followed the instructions to setup and host my own NuGet feed. I am running the web application on a Windows 2012 (IIS 8.5) box.
I build and
FWIW, I made the mistake of trying to fetch the packages from http://[server]/nuget/Packages and got the same error. Removing /Packages from the end of the source URL was the answer, so http://[server]/nuget is the correct url.