Board Thread:Questions and Answers/@comment-7580628-20151010122310/@comment-25390763-20151011003932

Head to your to Strategy Room and click on the Flowchart under Quests.

Find the quest here and click the red X next to it. Reload your game.

You'll find this glitch occurs when you complete a quest during a time that KC3kai is updating. It's happened to me a handful of times, including today.