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.
When I try to buy boosters with the coins I have the shop will not open on Facebook.
Its likely a connection issue. We cannot help you with bluestacks as although used, its not supported. However as regards Facebook, have you tried clearing cache and cookies from your browser?