react-native
Hermes engine error
Hermes.*error|HermesInternal.*not available|hermes.*compilation.*failed
Fixes
- 1.Enable Hermes in android/app/build.gradle: hermesEnabled = true
- 2.For iOS, ensure hermes_enabled = true in Podfile and run pod install
- 3.Clear Hermes bytecode cache: npx react-native start --reset-cache
react-nativehermesengine
Related Errors
react-native3 fixes
Metro bundler crash or port conflict
Metro.*error|metro bundler.*crashed|EADDRINUSE.*8081
- •Kill existing Metro process: npx kill-port 8081
- •Clear Metro cache: npx react-native start --reset-cache
react-native3 fixes
React Native native module not found
Native module.*cannot be null|TurboModuleRegistry.*not found|NativeModules.*undefined
- •Run npx pod-install (iOS) or rebuild the project after adding native deps
- •For New Architecture, ensure the module implements TurboModule interface
react-native3 fixes
React Native Android Gradle build failure
Gradle.*BUILD FAILED|execution failed for task.*:app:
- •Run cd android && ./gradlew clean then rebuild
- •Check android/gradle.properties for JVM memory: org.gradle.jvmargs=-Xmx4g