If you are getting an error message "You're not close enough to the door" when trying to unlock a door, it means that you are trying to unlock a door that has a location restriction (Geofence or Reader restriction) on it.
To resolve this, make sure that Bluetooth Sharing and Location Services are enabled for iPhone and NFC and Location Services for Android. Also, check that you are on the latest version of the Kisi App.
For more information on potential door unlock failures, please see this article.