Android: Just released my app to market, but cannot purchase?

I finally released my application, but I get the below message when I try to purchase it. I'm very concerned, has anyone seen this?

Purchase Cancelled.
Your order could not be processed.  Please try again.

Why can't I make purchases on my Android?

If you experience trouble making a purchase, follow the steps below: Make sure in-app purchase options are set correctly on your device. Play Store > Payment Methods. Close the game from the background and restart it.

Why can't I purchase apps on Play Store?

If you can't purchase apps on Google Play Store, you can usually fix the problem with these steps: Add some funds to your Google Play Credit or the debit/credit card listed as the payment method. Disable VPN/Proxy on your Android. Clear data from Google Play Store and Google Play Services.

As explained here, this is intentional on Google's part. I don't know the rationale for the policy, but there it is.