A. Ensure that your payment method is valid and has sufficient funds. If you are using a credit or debit card, check that it has not expired and that you are entering the correct information. If the app supports multiple payment methods, try using a different one to see if that resolves the issue.

B. Clear the app's cache or data in your phone's settings, as this can sometimes resolve payment processing issues. After clearing the cache, restart the app and try making your purchase again.