The Cash App may not be working for you because of a problem with your device or your internet connection. If you think there is any problem with the Cash App then please post your problem using the below comment box and someone from our community can help you. Also in the meantime, you can try the fixes mentioned below.
The Black/White screen is one of the most common problems in mobile phones and tablets. Usually, when you open an app, you will see a black screen for a few seconds, and then the app will crash with or without an error message. There are a few ways to fix this problem.
Most of the time, it could be a temporary loading issue. All you need to do is press the recent applications menu (usually the first left button) on your phone. Then you close the cash app that has this problem. Now open the app again. It can work normally.
Try restarting your iPhone/iPad. Press the Power off button for a few seconds and then choose Restart from the menu to restart your device. Now you can try to open the app, it may work fine.
If none of the above works then you can wait until your phone battery drains and it will power off on its own. After that put it to charge, and press the Power button. After that, it can work.
Lastly, if you can't fix it with anything, you may need to uninstall the app and reinstall it. iOS usually provides the option to restore settings and content from an iCloud backup, if you have enabled it before. Even in some rare cases, even the reinstall step doesn't work. If this is your case, try installing older versions of the app.
Cash App server may be down and this is causing loading issues. Please try after few minutes. Your wifi/mobile data connection is not working properly. Please check your data connection. Too many users are using the app at the same time. Please try after few minutes.