Using Visual Studio 2015 and trying to get a package from NuGet I was getting 2 errors:-
Install-Package : Too many automatic redirections were attempted.

&
An error occurred while retrieving package metadata for
I noticed there was a update for Visual Studio 2015 NuGet Package Manage for Visual Studio to version 3.1.60724.766 (from current 3.0.60624.657), so I downloaded and installed it. Same errors.
Fix
In Visual Studio 2015.
Tools Menu -> NuGet Package Manager -> Package Manager Settings
Click Package Sources
Click + sign
Add the following:-
Name: something like NuGet v2
Source: https://www.nuget.org/api/v2/
Untick the current nuget.org so it should look like:-

And now you should be able to install NuGet packages