This is a current "but" within the google play store and many android phones. If you get this; you need to clear your data within the google play store. You can do that by following the below steps.
- Go to Settings > Apps
- Under the list of apps, locate “Google Play Store“
- Tap on “Storage” and again tap on “Clear Data”
- Open Play Store and try downloading an app again
If you still have difficulty, email firstname.lastname@example.org