error code 9.0 - can't launch game

Thanks for the help! It seems to have resolved itself, but I'm not sure why. The game was trying to download something and that's where it seemed to get hung up. So I signed into game center on another device, which allowed it to download that package once, and I was able to access my game. I then double-checked my primary device and the game was past that initial download and launched normally (after not being able to launch for more than a day, including immediately before I tried it on the alternate device). So the problem has been resolved, but I'm not sure of the cause or if the solution was coincidental or something more.