The app doesn't work correctly. Please fix.
The app may not function correctly when your device is under high stress. Please try all the following methods under the stable network connection and confirm again.
+ Turn the power OFF
(Press and hold the Sleep/Wake button until the red slider appears. Drag the slider to turn your device completely off.
After the device turns off, press and hold the Sleep/Wake button again until you see the Apple logo.)
+ Stop Multitasking
# with iOS 6 or older
Double-click the Home button to see recently used apps. Long-press icons and tap the [-] mark on the left top.
# with iOS 7 or later
Double-click the Home button to see recently used apps. Then swipe up on the app you want to close.