Can't Install NuGet packages that require Newtonsoft.Json.10.0.1 in Visual Studio 2015

I've been having problem installing NuGet packages that require Newtonsoft.Json.10.0.1I just recently installed it and when ever I try installing packages that need it, I get this error:

Severity    Code    Description Project File    LineError       An error occurred while retrieving package metadata for 'Newtonsoft.Json.10.0.1' from source 'C:\Users\Sharon Umute\documents\visual studio 2015\Projects\sermon\packages'.         0

I tried upgrading to Newtonsoft.Json.10.0.2 and adding the path to Environment Variables but I keep getting the same error.I've checked the path, the Newtonsoft.Json.10.0.2 folder contains lib, tools, and Newtonsoft.Json.10.0.1.nupkg.I'd really appreciate some help with this.