I couldn't understand why the 'Unpublish app' button in Google's Developer Console isn't available (I can see it, but not press it).

It looks as if the link is disabled.
<a class="gwt-Anchor gux-disabled" disabled="">Unpublish app</a>
Anyone has any idea why is it so?


This is most probably because the app is still being distributed. It takes a couple of hours for the app to the released. This depends on the localisation of the app. if you left this default, the app will be distributed worldwide.
According to Android Authority:
Wait for a bit and try again. It also seems very wierd from Google, however the label has a grey color, making it seem unavailable. In fact it would be available, when clicking on it.