When opening my first React Native app, the web page appears empty.

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There could be a few reasons why your React Native app is appearing empty:

1. Make sure you have added some code to display something on the screen. You can start by adding some text or an image to get started.

2. Ensure that you have successfully installed all the required dependencies and libraries for React Native.

3. Check if there are any errors in the console. React Native offers helpful error messages to help you identify the issue.

4. If you are running your app on an iOS emulator, make sure that it is fully loaded and that you have granted permission for the app to run.

5. If you are running your app on an Android emulator, make sure that you have set up the emulator correctly and that it is running smoothly.

6. Lastly, double-check that you have saved all your changes and restarted the app to ensure that it is up-to-date.