I built LEAN Visual Studio plugin from Github and configured the path to price data.  However, when I try to login (Tools -> QuantConnect -> Log in) with my access key and user id, I am getting this error.   I am using Visual Studio 2017 Community under Windows 10 Pro. 

Could not load file or assembly ‘QuantConnect.Configuration, Version=, Culture=neutral, PublicKeyToken=null” or one of its dependencies.  The system cannot find the file specified.