Board Thread:Questions and Answers/@comment-180.214.232.68-20150416225636/@comment-26044650-20150417015105

Try restarting your app. Tap the home button twice, find the app and swipe it off the screen to close it down. Then start up the app and it should be fine.

It happened to me a few times - but by just simply restarting the app it worked for me.