Clearing data and cache on Android, or reinstalling apps through the Google Play Store is a useful way. There is also an erase cache partition like this:
1. Press the power button to turn off the phone > set the device to recovery mode.
2. Use the volume button to select, find the “Control Screen” option > select “Delete Cache Partition” and press the power button to confirm.
3. Finally, restart the system.
The "Unfortunately, app has stopped" problem can also be solved by restoring production settings.