We're aware of an issue with Facebook purchases for all King Games and our team is on it. 🛠️ Hang tight while we fix things! You can still enjoy the game, and we'll keep you posted once it's solved.
I'm having the same issue, both on the mobile app and on Facebook. I played one of the Mystery Quest levels to unlock, but that did nothing. There also doesn't seem to be a thing where it unlocks automatically after some period of time like most of the other games. I'd love to continue playing this game, but can't!
I have the same issue, plus none of my messages from friends show up. I do get the booster wheel in the mobile game, and a few of the requests. I've tried clearing my cache, as suggested, which works once, then the problem is back the next time I play the game. I have no problems with any of the other games, so clearly…