VS2015 is throwing an exception while adding a new Entity Data Model

Question

My Visual Studio 2015 is throwing an exception while I want to add a new Entity Data Model.
I want to a create Model from DB but when I click on the button "New Connection...", Visual Studio is throwing the following exception.

Answer 1

I usually delete the old (usually all) database connections from my Data Sources window when such a thing occurs. After deleting the old connections Visual Studio will let you to add a new one.