Hello xircx, thank you for using the template.
There are a handful of quests that don't have an instant reward, these usually are part of a larger chain that give a more satisfying reward in the end.
Additionally, Rinbin has a few quests where he only gives 1 coin.
What also could've happened was that you did get your reward, but the update floaters didn't show (if the reward was resources), this does not always mean you didn't get the resources. Sometimes the floaters just fail to show.
If the reward was trade goods or military, it could be that you have to refresh the page before you can see them.
If you are certain you did not get your reward, please click on the "In-Game Support" link in my signature and create a ticket.
It would be most helpful if you remember when exactly you completed this quest, what the name was or partial name.
We'll be able to look into it further from there.
- L