Finally, if you can't fix it with anything, you may need to uninstall the app and re-install it.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 Scribblenauts Unlimited App Problems and Troubleshooting Steps ✅ I'm getting black screen / white screen (blank screen) when I open Scribblenauts Unlimited?