No compatible apps connected. JavaScript Debugging can only be used with the Hermes engine.

Summary

I created a fresh expo project. Built Android development client APK.

I have enabled Hermes according to the documentation here: https://docs.expo.dev/guides/using-hermes/

eas build --profile devClient --platform android

Installed it on physical Android device. Start dev client on my machine:

npx expo start --dev-client

Then connect the development client ( Scan QR code using Expo GO ). App loads fine but when I press “open JS debugger” the dev tools don’t open and I get an console error. No compatible apps connected. JavaScript Debugging can only be used with the Hermes engine.

The dev menu says try refreshing the app manually first for the debugger to work but that does not solve it for me.

Navigating to “home” in the development client after initial load and opening the metro again seems to solve this issue. Something seems off when starting the development client by scanning the QR code through Expo.

Managed or bare workflow?

bare

What platform(s) does this occur on?

Android

Package versions

  "dependencies": {
    "expo": "~47.0.8",
    "expo-dev-client": "~2.0.1",
    "expo-status-bar": "~1.4.2",
    "react": "18.1.0",
    "react-native": "0.70.5",
    "expo-splash-screen": "~0.17.5"
  },

Environment

expo-env-info 1.0.5 environment info: System: OS: macOS 12.5.1 Shell: 3.2.57 - /bin/bash Binaries: Node: 16.14.0 - /usr/local/bin/node Yarn: 1.22.10 - /usr/local/bin/yarn npm: 8.3.1 - /usr/local/bin/npm Watchman: 2022.10.17.00 - /usr/local/bin/watchman Managers: CocoaPods: 1.11.3 - /usr/local/bin/pod SDKs: iOS SDK: Platforms: DriverKit 21.4, iOS 15.4, macOS 12.3, tvOS 15.4, watchOS 8.5 Android SDK: API Levels: 26, 29, 30 Build Tools: 29.0.2, 30.0.2 System Images: android-22 | Google APIs Intel x86 Atom, android-23 | Google APIs Intel x86 Atom, android-26 | Google APIs Intel x86 Atom, android-29 | Google APIs Intel x86 Atom, android-29 | Google Play Intel x86 Atom, android-30 | Google APIs Intel x86 Atom IDEs: Android Studio: 4.1 AI-201.8743.12.41.6858069 Xcode: 13.3.1/13E500a - /usr/bin/xcodebuild npmPackages: expo: ~47.0.8 => 47.0.8 react: 18.1.0 => 18.1.0 react-native: 0.70.5 => 0.70.5 npmGlobalPackages: eas-cli: 2.8.0 expo-cli: 6.0.8 Expo Workflow: bare

Reproducible demo

eas.json:

{
  "cli": {
    "version": ">= 2.8.0"
  },
  "build": {
    "devClient": {
      "distribution": "internal",
      "developmentClient": true,
      "android": {
        "buildType": "apk"
      },
      "ios": {
        "simulator": true
      }
    }
  }
}

app.json:

{
  "expo": {
    "name": "...",
    "slug": "...",
    "scheme": "...",
    "owner": "...",
    "version": "1.0.0",
    "orientation": "portrait",
    "userInterfaceStyle": "light",
    "jsEngine": "hermes",
    "extra": {
      "eas": {
        "projectId": "..."
      }
    },
    "updates": {
      "fallbackToCacheTimeout": 0
    },
    "assetBundlePatterns": [
      "**/*"
    ],
    "android": {
      "package": "...",
      "versionCode": ...
    }
  }
}

Stacktrace (if a crash is involved)

No response