To play games through the WildTangent Games Application, you must "allow cookies" in your Web browser.
If you have trouble downloading games, receive a security certificate message, or you're not able to log in to your account, it may help to clear those "cookies".
This article on the Microsoft support site will help with how to clear and manage cookies in Internet Explorer.
If you are using Microsoft Edge, this article is the one you need.
And a large number of users are on Google Chrome, so this article will help with that.