ios build failing with error `No member named 'unit' in 'facebook::yoga::StyleLength'`

[gvermanyvah]

Description

I am using react native cli to test and while building in Xcode the following error is thrown: No member named 'unit' in 'facebook::yoga::StyleLength'. It worked the first time but keeps failing after that.

Steps to reproduce

I am following react native amplify doc to create this app

This error is thrown when running command npm run ios.
error Failed to build ios project. "xcodebuild" exited with error code '65'. To debug build logs further, consider building your app with Xcode.app, by opening 'amplified_todo.xcworkspace'.

React Native Version

0.81.1

Affected Platforms

Runtime - iOS, Build - MacOS

Output of npx @react-native-community/cli info

System:
  OS: macOS 15.5
  CPU: (8) arm64 Apple M1
  Memory: 154.88 MB / 8.00 GB
  Shell:
    version: "5.9"
    path: /bin/zsh
Binaries:
  Node:
    version: 22.19.0
    path: ~/.nvm/versions/node/v22.19.0/bin/node
  Yarn: Not Found
  npm:
    version: 10.9.3
    path: ~/code/aws-amplify/amplified_todo/node_modules/.bin/npm
  Watchman:
    version: 2025.08.25.00
    path: /opt/homebrew/bin/watchman
Managers:
  CocoaPods:
    version: 1.16.2
    path: /opt/homebrew/lib/ruby/gems/3.4.0/bin/pod
SDKs:
  iOS SDK:
    Platforms:
      - DriverKit 24.5
      - iOS 18.5
      - macOS 15.5
      - tvOS 18.5
      - visionOS 2.5
      - watchOS 11.5
  Android SDK: Not Found
IDEs:
  Android Studio: Not Found
  Xcode:
    version: 16.4/16F6
    path: /usr/bin/xcodebuild
Languages:
  Java: Not Found
  Ruby:
    version: 3.4.5
    path: /opt/homebrew/opt/ruby/bin/ruby
npmPackages:
  "@react-native-community/cli":
    installed: 20.0.0
    wanted: 20.0.0
  react:
    installed: 19.1.0
    wanted: 19.1.0
  react-native:
    installed: 0.81.1
    wanted: 0.81.1
  react-native-macos: Not Found
npmGlobalPackages:
  "*react-native*": Not Found
Android:
  hermesEnabled: true
  newArchEnabled: true
iOS:
  hermesEnabled: true
  newArchEnabled: true

Stacktrace or Logs

Error from Xcode:
`reproducer-app-react-native/ReproducerApp/node_modules/react-native-safe-area-context/common/cpp/react/renderer/components/safeareacontext/RNCSafeAreaViewShadowNode.cpp:19:12 No member named 'unit' in 'facebook::yoga::StyleLength'`

MANDATORY Reproducer

https://github.com/gvermanyvah/reproducer-app-react-native

Screenshots and Videos

No response

[gvermanyvah]

The issue was resolved by updating react-native-safe-area-context to version ^5.6.1, in alignment with the React Native 0.81.1 changelog
.
This version is the supported release as per the react-native-safe-area-context documentation]