Board Thread:Questions and Answers/@comment-190.225.130.141-20131202124124/@comment-5646122-20131202143349

I agree with you that this may be a serious bug in the system. I suggest reporting it once again for good measure.

If you like, you can try inviting people again from Quests and see what happens. The trick with those stores is that brand new players must have never touched the game before and should only open it based on the request you send them. Then they should play past the intro and a bit further for a min. Then it should count. Have you unlocked other stores with the same quest? If yes, and it is only Sterling Crescent that is not working, they only solution is to report it again and wait for changes, I am afraid.