If that is your case, try installing older versions of the app. iOS usually provides an option to restore settings and content from iCloud backup, if you've enabled it previously. After that put it to charge, and press the power button. Press the power off button for few seconds and then choose restart from the menu to restart your device.Now you can try opening the app, it may work fine. Then you close the app that has this issue. You just need to press the recent applications menu (usually the first left button) in your phone. Usually when you open an app, you will see a black screen for few seconds and then app will crash with or without an error message. It is one of the most common problem in mobile phones and tablets.
Common Candy Crush Saga App Problems and Troubleshooting Steps ✅ I'm getting black screen / white screen (blank screen) when I open Candy Crush Saga?