Quote Originally Posted by Spririte View Post
The other forum post I saw with the same issue says to "Clear IE History" but I have no clue what this means. Any help here?
The launcher is basically using Internet Explorer. So even if that's not the normal browser you use, open up Internet Explorer, then in the option delete the browsing history, specifically "Temporary Internet files and website files".

After doing that, close IE and relaunch the game. It'll probably work again