You can't launch it that way its missing paramaters required to run.
Simply login to the website with your account in chrome or firefox
Press F12 and paste this in to the javascript console and press enter.
Code:
$.post(APPLICATION_CONTEXT + "/Launcher/auth", {
timestamp : new Date().getTime() / 1000
}, function(data){ window.location = data.launcherAuthUrl; });
*or just use IE and click Start Game*
Attached are some files that may help.
Fix up the reg key if you havent installed the game with the installer on this pc to have the correct path and run it.
Then reset your browser and it will be able to handle the launcher code.
