For Android users: When purchased Tribes doesn't unlock.
Clearing cache & data from Google Play app solves this problem.
1. On your Android phone or tablet, open your [Settings] and then [Apps].
2. At the top of the screen, tap [More] and then [Show system].
3. Scroll down and tap [Google Play services].
4. Tap [Storage] and then [Clear Cache].
5. Next, tap [Manage Space] and then [Clear all Data].
6. Restart Hexonia.