Invariant Violation: "main" has not been registered. This can happen if:
Author: incredev34Created Sep 9, 2025Updated Sep 17, 2026
LabelsStaleNeeds: ReproNeeds: Attention
Description
I have run the react native project for android and got the error on the emulator screen just after opening it.
Invariant Violation: "main" has not been registered. This can happen if:
* Metro (the local dev server) is run from the wrong folder. Check if Metro is running, stop it and restart it in the current project.
* A module failed to load due to an error and `AppRegistry.registerComponent` wasn't called., js engine: hermes
Steps to reproduce
Install application and yarn android.
React Native Version
0.79.5
Affected Platforms
Runtime - Android
Output of npx @react-native-community/cli info
System:
OS: Windows 11 10.0.26100
CPU: (20) x64 13th Gen Intel(R) Core(TM) i7-13650HX
Memory: 18.30 GB / 39.69 GB
Binaries:
Node:
version: 22.14.0
path: C:\nvm4w\nodejs\node.EXE
Yarn:
version: 1.22.22
path: C:\nvm4w\nodejs\yarn.CMD
npm:
version: 10.9.2
path: C:\nvm4w\nodejs\npm.CMD
Watchman: Not Found
SDKs:
Android SDK:
API Levels:
- "34"
- "35"
Build Tools:
- 34.0.0
- 34.0.0
- 34.0.0
- 34.0.0
- 35.0.0
- 35.0.0
- 35.0.0
- 35.0.0
- 35.0.0
- 35.0.1
- 36.0.0
System Images:
- android-34 | Google APIs Intel x86_64 Atom
- android-34 | Google Play Intel x86_64 Atom
- android-35 | Google Play Intel x86_64 Atom
- android-35 | Pre-Release 16 KB Page Size Google Play Intel x86_64 Atom
- android-36 | Google APIs Intel x86_64 Atom
- android-36 | Google Play Intel x86_64 Atom
- android-36 | Pre-Release 16 KB Page Size Google APIs Intel x86_64 Atom
Android NDK: Not Found
Windows SDK: Not Found
IDEs:
Android Studio: AI-243.24978.46.2431.13363775
Visual Studio: Not Found
Languages:
Java:
version: 17.0.10
path: /c/Program Files/Java/jdk-17/bin/javac
Ruby: Not Found
npmPackages:
"@react-native-community/cli":
installed: 18.0.0
wanted: ^18.0.0
react:
installed: 19.0.0
wanted: 19.0.0
react-native:
installed: 0.79.5
wanted: 0.79.5
react-native-windows: Not Found
npmGlobalPackages:
"*react-native*": Not Found
Android:
hermesEnabled: true
newArchEnabled: false
iOS:
hermesEnabled: Not found
newArchEnabled: Not found
info React Native v0.81.1 is now available (your project is running on v0.79.5).
info Changelog: https://github.com/facebook/react-native/releases/tag/v0.81.1
info Diff: https://react-native-community.github.io/upgrade-helper/?from=0.79.5&to=0.81.1
info For more info, check out "https://reactnative.dev/docs/upgrading?os=windows".
Stacktrace or Logs
09-09 19:19:29.561 4602 4779 E ReactNativeJS: ReferenceError: Property 'document' doesn't exist, js engine: hermes
09-09 19:19:29.580 4602 4779 I ReactNativeJS: Running "main" with {"rootTag":11}
09-09 19:19:29.582 4602 4779 E ReactNativeJS: Invariant Violation: "main" has not been registered. This can happen if:
09-09 19:19:29.582 4602 4779 E ReactNativeJS: * Metro (the local dev server) is run from the wrong folder. Check if Metro is running, stop it and restart it in the current project.
09-09 19:19:29.582 4602 4779 E ReactNativeJS: * A module failed to load due to an error and `AppRegistry.registerComponent` wasn't called., js engine: hermes
MANDATORY Reproducer
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Screenshots and Videos
Source: react/react-native