Sometimes the Google Play Store app doesn't get a notification of a purchase, causing in-app purchases not to work.
As a fix for this you can clear your Google Play Store data.
1. Close Concepts.
2. Go to Settings > Apps > Google Play Store > Storage > Clear Data.
3. Start the Play Store app before starting up Concepts.
As a fix for this you can clear your Google Play Store data.
1. Close Concepts.
2. Go to Settings > Apps > Google Play Store > Storage > Clear Data.
3. Start the Play Store app before starting up Concepts.