UE5.7.1 Packaging Android JNI Error: ld.lld: error: undefined symbol: UE::Jni::FEnv::FEnv()

[Devichi]

I’m trying to package an android build on UE5.7.1 but I’m running into the error: ld.lld: error: undefined symbol: UE::Jni::FEnv::FEnv() along with several other Java-related errors.

Here’s what I tried:

• Installing everything using Turnkey and just using the defaults
• Installing android studio / ndk / jdk without Turnkey based on the exact versions as specified in Android Development Requirements for Unreal Engine | Unreal Engine 5.7 Documentation | Epic Developer Community
• Everything in Setting Up Android SDK and NDK for Unreal | Unreal Engine 4.27 Documentation | Epic Developer Community
• Changing the SDK/NDK versions in Project Settings > Android SDK
• Uninstalling any other Java installations
• Checking that my ANDROID_HOME, JAVA_HOME, NDK_ROOT, NDKROOT environment variables match the intended path
• Restarting my computer
• Reinstalling the SDK via the editor
• Choosing to build different android flavors

Is there anything else that I can try?

[Devichi]

I managed to fix this by adding the following in (Game)Editor.Target.cs:

GlobalDefinitions.Add(“USE_ANDROID_JNI=1”);
bOverrideBuildEnvironment = true;

I am not sure if there is a more suitable workaround than this, but that’s what worked for me.