If you see an error message when trying to buy coins, it means that there is an issue with your purchase.
First, please ensure that you are logged in to a Google Play or iTunes account on the device with a valid payment method set up.
Accepted payment methods
Other purchase problems
Since purchases in the Tapas app for Android and iOS are handled by Google Play and Apple respectively, we are unable to troubleshoot specific problems with payments or purchases.
If you’re using an Android device, please check Google Play’s Problems with in-app purchases article for help troubleshooting.
If you’re using an Apple iOS device, please contact iTunes Support for help.