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Did you provide leaderboard ids in those actions? Unlock achievement only works for hidden achievements. Did you provide a hidden achievement to that action?
Does the one in the example scene work?
If the example scene works are you sure it is calling the action at all? Could you put a debug message or something as well on the action to make sure they are all being called?Are you sure you copied your leaderboard id exactly? I can teamviewer with you if you wish to try and find the issue.