This indicates Paprika is having trouble accessing the Google Play Store.
1. Make sure that your device is connected to the Internet.
2. Open Android Settings -> Apps -> Google Play Store -> Storage and select Clear Cache.
3. Open the Play Store and search for Paprika Recipe Manager 3 or find it in the Installed Apps section.
4. Open Paprika 3 and and try again.
When I try to buy the full version of Paprika 3 it says "Billing service not available".
