TypeError: Cannot read property 'installCoreFunctions' of undefined, js engine: hermes (RN 0.67.1 + Reanimated v2.3.1)

[Sylber23]

Description

TypeError: Cannot read property 'installCoreFunctions' of undefined, js engine: hermes

Expected behavior

This error should not occur and the app should start up

Actual behavior & steps to reproduce

App not starting

Reproduce:

1. Update RN to latest version 0.67.1
2. Update reanimated to 2.3.1
3. start app

Snack or minimal code example

https://83hf7.csb.app/

Package versions

name	version
react-native	0.67.1
react-native-reanimated	2.3.1
NodeJS	16.10
Xcode	13

Affected platforms

• [X] Android
• [X] iOS
• [ ] Web

[github-actions[bot]]

Hey! 👋

The issue doesn't seem to contain a minimal reproduction.

Could you provide a snippet of code, a snack or a link to a GitHub repository that reproduces the problem?

[piaskowyk]

Hey, it looks similar to this issue: https://github.com/software-mansion/react-native-reanimated/issues/2525 This solution should help: https://github.com/software-mansion/react-native-reanimated/issues/2525#issuecomment-1027816444 if it doesn't help, could you provide a repo with reproduction of this issue?

[ecosse3]

I had the same issue yesterday. Just make sure that you have two imports in MainAppliaction.java for Android and getJSModulePackage() method.

For iOS, if you are using flipper I had some problems after the update and had to downgrade Deployment Version for RCT-Folly, pod update, and rebuild.

Podfile

  use_flipper!()
  post_install do |installer|
    installer.pods_project.targets.each do |target|
      target.build_configurations.each do |config|
        config.build_settings['IPHONEOS_DEPLOYMENT_TARGET'] = '12.0'
      end

      case target.name
      when 'RCT-Folly'
        target.build_configurations.each do |config|
          config.build_settings['IPHONEOS_DEPLOYMENT_TARGET'] = '9.0'
        end
      end
    end
    flipper_post_install(installer)
    react_native_post_install(installer)
  end

Then my app works with Renimated on both platforms.

The app is still crashing in Debug mode on Android but that's another issue related to flipper & reanimated.

[Sylber23]

I had the same issue yesterday. Just make sure that you have two imports in MainAppliaction.java for Android and getJSModulePackage() method.

For iOS, if you are using flipper I had some problems after the update and had to downgrade Deployment Version for RCT-Folly, pod update, and rebuild.

  use_flipper!()
  post_install do |installer|
    installer.pods_project.targets.each do |target|
      target.build_configurations.each do |config|
        config.build_settings['IPHONEOS_DEPLOYMENT_TARGET'] = '12.0'
      end

      case target.name
      when 'RCT-Folly'
        target.build_configurations.each do |config|
          config.build_settings['IPHONEOS_DEPLOYMENT_TARGET'] = '9.0'
        end
      end
    end
    flipper_post_install(installer)
    react_native_post_install(installer)
  end

Then my app works with Renimated on both platforms.

The app is still crashing in Debug mode on Android but that's another issue related to flipper & reanimated.

Thanks a lot, this worked for me as well.

[hannojg]

For future reader, i just want to add that I get that error as soon as I turn on turbo modules arch on iOS