When I click the avatar button, the "Choose an Avatar" dialogue appears, but it's empty. I've quit and reopened the game, and deleted and reinstalled the app. What else can I do to fix it? Btw, I'm on a Macbook Pro running Yosemite. Picture: https://www.dropbox.com/s/py1fqw99f0yad4p/SL%20No%20Avatars.png?dl=0