Unable to Load Source Control Plugin

PROBLEM

You receive the following error when you attempt to integrate TFS in Test Studio Standalone version and you do not have Visual Studio installed:

SOLUTION

Install the appropriate version of Visual Studio Team Explorer. This is the client SKU that allows you to access the TFS functionality.

Even you have or you would install Visual Studio 2015 it does not include VS Team Explorer. In order to use our TFS integration, you need to install explicitly Team Explorer.