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.
It could be that you have lost your connection. Check in the app settings on the home screen to see that you're still connected to kingdom/facebook and connect again if you need to. This should return your friend list etc.