Unable to load script Make sure you are either running a Metro server or that your bundle ‘index.android.bundle’  Solved

For me, I fixed this error by running the command below. I found that the assets folder and its file index.android.bundle is missing in my case. This error means that the app cannot find the bundle file of Android in the assets folder. So we need to create the assets folder and the bundle file manually or by using some commands

npx mkdirp android/app/src/main/assets/
npx react-native bundle --platform android --dev false --entry-file index.js --bundle-output android/app/src/main/assets/index.android.bundle --assets-dest android/app/src/main/res
npm run android

If it did fix the error then you need to check more information on the net, here is some additional information I found on the internet.

React Native Error: Unable to load script

This error message occurs when React Native is unable to load the JavaScript code required to run the application. There are a few possible causes for this error:

1. Metro bundler not running: Make sure that the Metro bundler is running either by running npm start or react-native start in the root directory of your project.
2. Bundle not packaged correctly: Ensure that your bundle is packaged correctly for release and that it includes all the necessary dependencies.

How do fixed unable to load the script

1. Make sure the Metro bundler is running by running npm start or react-native start in the root directory of your project.
2. If the Metro bundler is running, try resetting the cache by running npm start -- --reset-cache.
3. If the issue persists, try rebuilding the app by running react-native run-android or react-native run-ios.
4. If you’re still unable to resolve the issue, check the logs for more information about the error. You can find the logs in the terminal where the Metro bundler is running or in the device logs if you’re running the app on a physical device.

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