Such issue is usually caused by unstable network connection. Make sure that your network connection is stable. If the error continues try the steps below.

Speed Up iOS 10 by Disabling Transparency & Motion

Some devices seem to struggle to render visual effects on iOS 10. By disabling transparency and motion eye candy, you can speed up the general interactivity of iOS on your device.

Open the "Settings"

Scroll down and select "General"

Select "Accessibility"

Locate "Increase Contrast" and set "Reduce Transparency" to the ON position

Return to "Accessibility"

Set "Reduce Motion" to the ON position

Boost Performance By Disabling Background App Refresh

Background App Refresh is an interesting feature that allows background app activity in iOS. While it is well-intentioned, it can lead to a decrease in device performance. Turning it off is easy, and the only side effect is that when you open an app that gets details from the internet, it refreshes on open rather than in the background – no big deal.

Open the "Settings" app

Scroll down and select "General"

Find "Background App Refresh" and set it to the OFF position

Forcibly Reboot the Device

Sometimes, forcing the device to reboot can help performance. This is especially true if there are a lot of background processes active on your device. Rebooting does not guarantee a performance boost, but it is easy to do:

Press and hold down the Power and Volume Down buttons for ~5 seconds

Swipe the slider to turn off the device

Wait until the device has turned completely off (~30 seconds)

Press and hold the Power button until the device turns back on

If the issue persists, try uninstalling and re-installing

To uninstall, please follow the below instructions:

Tap and hold down on the app icon until it wiggles

Press the 'X' on the app.

Tap "Delete" when prompted

Open the App Store and reinstall the app.