Troubleshooting Issues

We hope that flipper works well out of the box, but the software is a work in progress and problems will occur. Below are some known issues and steps you can take to try to resolve them.

Mac Desktop app

Flipper won't launch on Mac

  • If the window is appearing, try opening the Chrome DevTools within Flipper. To do so, from the View menu select Toggle Developer Tools or press CMD+Option+I and check if there are any errors on the console.
  • Launch Flipper from the command line using /Applications/Flipper.app/Contents/MacOS/Flipper. This should give you some logs, that might be helpful when debugging.
  • Delete ~/.flipper and try relaunching Flipper.
  • Delete Flipper from your applications folder and redownload Flipper.
  • If you're using yarn start to run from source, make sure all dependencies are installed correctly by running yarn install.

iOS Simulator missing from devices dropdown

  • Check that xcode-select -p shows the same XCode version that you're using. If not, see xcode-select for how to select the correct version.

No plugins showing up for your device

  • Check your device isn't on the list of known incompatibilities.
  • Make sure your version of Flipper is up to date.
  • Make sure the mobile SDK you are using is relatively recent (<1 month old).
  • Open Chrome dev tools within Flipper. To do so, from the View menu select Toggle Developer Tools or press CMD+Option+I and check if there are any errors on the console.
  • Delete ~/.flipper.
  • Uninstall and reinstall the mobile app.
  • Make sure the time and date are set correctly on your mobile device and desktop computer.
  • If no app plugins are showing up, there may be a connectivity issue between Flipper and your app. Check connection issues to see if anything is failing.

Connection Issues

The Flipper SDK includes an in-app connection diagnostics screen to help you diagnose problems.

Android

Replace <APP_PACKAGE> below with the package name of your app, e.g. com.facebook.flipper.sample. On a terminal, run the following:

adb shell am start -n <APP_PACKAGE>/com.facebook.flipper.android.diagnostics.FlipperDiagnosticActivity

This will only work if you added FlipperDiagnosticActivity to your AndroidManifest.xml. See getting started for help.

iOS

You'll need to manually add this ViewController to your app to see the in-app diagnostics.

Known Incompatibilities

The following devices are known to be incompatible or face issues with flipper:

  • Physical iOS devices. Currently on iOS, only simulators are supported (Tracking Issue).
  • Some Samsung devices (Tracking Issue).
  • Genymotion emulators on Android 8+ are reported to have issues.

File an Issue

Still not working? File an issue on GitHub with the chrome DevTools logs and the output from the diagnostics screen, if relevant.

Android

Build error after including the Flipper dependency:

Exception from call site #4 bootstrap method

This can happen because we include OkHttp3 as dependency which makes use of Java 8 features. There are two ways of dealing with this:

Enable Java 8 support

Add this to your Gradle config:

android {
compileOptions {
targetCompatibility = "8"
sourceCompatibility = "8"
}
}

Exclude the OkHttp3 dependency

Alternatively, if you don't plan on making use of OkHttp, you can exclude the dependency from the build entirely:

debugImplementation('com.facebook.flipper:flipper:*') {
exclude group: 'com.squareup.okhttp3'
}

iOS

Build errors in React Native

If you experience errors such as Undefined symbol: associated type descriptor for FloatLiteralType or Undefined symbol: __swift_FORCE_LOAD_$_swiftCompatibility50 after going through the Getting Started tutorial you must do as follows:

  1. Open your project in Xcode;

  2. Click in your project's name on the left side;

  3. Make sure that you choose your project under PROJECT on the screen that has been opened;

  4. Go to the tab Build Settings;

  5. Search for LD_RUNPATH_SEARCH_PATHS (make sure that All is selected);

  6. Double-click Runpath Search Paths and, in the dialog that opens, click on the plus button at the bottom-left corner and paste /usr/lib/swift $(inherited) there;

    Screenshot showing the places mentioned in the first steps
  7. Now search for LIBRARY_SEARCH_PATHS;

  8. Double-click Library Search Paths and, in the dialog that opens, add the following items:

    "$(TOOLCHAIN_DIR)/usr/lib/swift/$(PLATFORM_NAME)"
    "$(TOOLCHAIN_DIR)/usr/lib/swift-5.0/$(PLATFORM_NAME)"
    "$(inherited)"

    Note: all of them should be added as non-recursive (the default).

    In the end it should look like this:

    Screenshot showing the places mentioned in the last steps
  9. Now you can run your build normally.