If you've made purchases in the game or other applications before, one of the following reasons may be causing the problem:
1. There was a break in the internet connection. Your connection must be stable to process purchases, so we recommend using Wi-Fi or a 3G/4G connection.
2. Temporary problems with the application store. All in-game purchases are processed by the store the game was downloaded from. It's possible the store is overloaded and unable to process your request. In that case, just wait a few minutes and try again.
3. Problems with the store app. These are usually solved by restarting your device.

If you've never made purchases in the game or other applications before, the problem may be one of the following:
1. Incorrect payment information. The easiest way to fix this is to delete the current payment method and start over.
2. Unsupported payment method. The application store might not support the payment method you want to use. The list of available payment methods can be found in the support section of your device's application store.

If you're still having problems making purchases, please contact the application store's support service.