No apps connected. Sending "reload" to all React Native apps failed. Make sure your app is running in the simulator or on a phone connected via USB.

On my Iphone, React Native Debugger does not work.

With emulator there is no problem. But when I use my Iphone, If I click reload button in Chrome React Native Debugger it is not working and it throws below error.

I can see logs on my Chrome React native debugger but it is not stable.

Warn in Metro bundler console:

No apps connected. Sending "reload" to all React Native apps failed. Make sure your app is running in the simulator or on a phone connected via USB.

Real device is connected. My all devices use same Wireless network.

React Native version:

System: OS: macOS 10.15.5 CPU: (8) x64 Intel® Core™ i7-4770HQ CPU @ 2.20GHz Memory: 110.77 MB / 16.00 GB Shell: 3.2.57 - /bin/bash Binaries: Node: 12.13.1 - /usr/local/bin/node Yarn: Not Found npm: 6.14.6 - /usr/local/bin/npm Watchman: 4.9.0 - /usr/local/bin/watchman Managers: CocoaPods: 1.9.0 - /usr/local/bin/pod SDKs: iOS SDK: Platforms: iOS 13.6, DriverKit 19.0, macOS 10.15, tvOS 13.4, watchOS 6.2 Android SDK: API Levels: 23, 28, 29 Build Tools: 28.0.3, 29.0.2, 29.0.3 System Images: android-28 | Google Play Intel x86 Atom, android-29 | Google APIs Intel x86 Atom, android-29 | Google Play Intel x86 Atom Android NDK: Not Found IDEs: Android Studio: 3.5 AI-191.8026.42.35.6010548 Xcode: 11.6/11E708 - /usr/bin/xcodebuild Languages: Java: 1.8.0_232 - /usr/bin/javac Python: 2.7.16 - /usr/bin/python npmPackages: @react-native-community/cli: Not Found react: 16.11.0 => 16.11.0 react-native: 0.62.2 => 0.62.2

Steps To Reproduce

1. Connect IOS device (IOS 13.6) to device.
2. Validate real device connection on XCode
3. Start app on real device
4. Debugger and metro bundler starts
5. Press reload button in debugger and get above error in metro bundler console

[Johbrun]

Ok I solved this issue "No apps connected. " (on Android Emulator). Please follow this steps (only for Android) :

• Open MainApplication.java and remove import com.facebook.react.BuildConfig;

• Reset metro bundler cache : npx react-native start --reset-cache

• Remove Android assets cache : cd android && ./gradlew clean

• Relaunch metro server : npx react-native run-android

And see the magic 🎉

If you have an error like Invariant Violation: Module AppRegistry is not a registered callabel module, scroll on your terminal to see the root cause.

[DzTheRage]

React Native is a real piece of work.