In order to use some blocks/features in our platform, the app requires certain permissions to be enabled. Because these permissions are used by the app, Google requires you to provide a privacy policy. An example of a privacy policy can be found on the following page:

You can enter the link to your privacy policy in the Google Play section of the publish page in AppMachine. 

Once you've entered the privacy policy URL, update your app by clicking the "Update Now" button.