react-native: Invariant Violation: "myAppName" has not been registered

Description

i’m trying to running on ios emulator, but without success:

Invariant Violation: "myAppName" 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

metro is started, and build, so i think the problem is:

A module failed to load due to an error and AppRegistry.registerComponent wasn’t called., js engine: hermes

Version

0.70.2

Output of `npx react-native info`

System: OS: macOS 12.6 CPU: (8) arm64 Apple M1 Pro Memory: 316.59 MB / 32.00 GB Shell: 5.8.1 - /bin/zsh Binaries: Node: 16.17.1 - /usr/local/bin/node Yarn: Not Found npm: 8.15.0 - /usr/local/bin/npm Watchman: 2022.07.04.00 - /opt/homebrew/bin/watchman Managers: CocoaPods: 1.11.3 - /Users/mantegnous/.rvm/gems/ruby-2.7.5/bin/pod SDKs: iOS SDK: Platforms: DriverKit 21.4, iOS 16.0, macOS 12.3, tvOS 16.0, watchOS 9.0 Android SDK: Not Found IDEs: Android Studio: 2021.3 AI-213.7172.25.2113.9014738 Xcode: 14.0.1/14A400 - /usr/bin/xcodebuild Languages: Java: 11.0.11 - /usr/bin/javac npmPackages: @react-native-community/cli: Not Found react: ^18.2.0 => 18.2.0 react-native: ^0.70.2 => 0.70.2 react-native-macos: Not Found npmGlobalPackages: react-native: Not Found

Steps to reproduce

i’m running ios

Snack, code example, screenshot, or link to a repository

About this issue

Original URL
State: open
Created 2 years ago
Reactions: 7
Comments: 33

Most upvoted comments

Check the App name in MainActivity at getMainComponentName function, app.json, and package.json it will same in these 3 places.

+31

vivkikkk on Apr 4, 2023

I’m getting this on RN 0.71, any solution?

RalissonMattias on Jan 17, 2023

Problem solved by fixing deprecated-react-native-prop-types

Daha62 on Oct 31, 2022

I am getting the same error after upgrading to react native 0.71.4

muzhaqi16 on Mar 10, 2023

Check the App name in MainActivity at getMainComponentName function, app.json, and package.json it will same in these 3 places.

@methineeinkan After using the Upgrade Helper to go to 0.71.6, I had the wrong moduleName in my AppDelegate.mm file. Thanks!

Chuabacca on Apr 12, 2023

I getting the same issue except my issue doesn’t appear to be related to the js engine: hermes. @ErickJ3 solution did not work for me. I’m running 0.71.4 and testing and iOS app.

brettbl on Apr 1, 2023

having the same problem

Daha62 on Oct 26, 2022

I fix the problem by cold boot the avd

afiq234 on Nov 4, 2023