Board Thread:Current Major Glitch Discussion/@comment-112.218.195.93-20160908021304/@comment-28845529-20160908083028

There are a limited number of quests you can complete. You have probably completed all of the available quests at this point. However, more quests become available during events such as the two events we had over the summer. A new event, Harvest Festival, has been released on iPad and will be released on Android, Kindle, and Windows soon.

I hope that helps.