At the moment Hue Essentials does not support the configuration of the Philips Hue app for the Hue smart button. This is something that is on the wish list for future development, so there is nothing wrong with your button configuration. The button will still work fine when configured through the Philips Hue app, but you cannot edit it in Hue Essentials. If you would like to edit it in Hue Essentials, you need to reset it first so you can set it up again.