If you are unable to make a purchase in the game, please check that your device has been enabled to make in-app purchases.

For iOS devices:

1. Tap Settings
2. Select General
3. Select Restrictions
4. Scroll down to In-App Purchases and make sure that the toggle switch is set to ON

For Android devices:

1. Open the Google Play Store app
2. Tap the menu button then select Settings
3. Scroll down to where it says Parental controls and tap on it
4. In the next window, be sure that Parental controls are disabled

For Amazon devices:

1. Open the Amazon Appstore app
2. Open the menu, then tap Settings
   
3. Clear the checkbox next to In-App Purchasing

If it has not helped, make sure your billing account information is up-to-date.

For iOS devices:

1. Tap Settings
2. Select iTunes & App Store
3. Tap your Apple ID and choose View Apple ID
4. Tap Payment Information and ensure your payment method is correct and up-to-date

For Android devices:

1. Open the Google Play Store app
2. Tap the Menu icon in the upper left
3. Select My Account
4. Select Add Payment Method or More Payment Settings and ensure your payment method is correct and up-to-date

For Amazon devices:

1. Visit amazon.com
2. Click on My Account
3. Scroll down to Digital Content and click on Manage Your Content and Devices
4. Click the Settings tab and ensure your payment information is up-to-date