Your tablet may be lagging from running too many apps at once. Try closing some apps. If that does not work, try restarting your tablet. If the lag persists, you may want to reset your tablet to factory settings.

This is usually caused by a temporary problem which causes the app to close unexpectedly. Basic troubleshooting, like turning off your device for a minute, often solves the problem .

You can power off the tablet by holding the power button. Then press and hold the volume UP button and the power button simultaneously. This will bring you to a menu called “Android System Recovery <e3>.” Scroll to the option “wipe data/factory reset” using the volume buttons and select it using the power button. This should work.