Execution failed for task ':flutter_unity_widget:compileDebugKotlin'

[chetu-ko]

Hello,

I'm encountering a compilation error during the compileDebugKotlin task for the :flutter_unity_widget module in my Flutter app. The error message suggests a Gradle version mismatch, but I've double-checked and both versions seem to be the same.

What went wrong:
Execution failed for task ':flutter_unity_widget:compileDebugKotlin'.
A failure occurred while executing org.jetbrains.kotlin.compilerRunner.GradleCompilerRunnerWithWorkers$GradleKotlinCompilerWorkAction  
Compilation error. See log for more details

Flutter App Version Details:

Flutter: 3.19.2
Gradle:
Distribution URL: Distribution https://services.gradle.org/distributions/gradle-7.6-bin.zip
Classpath: classpath 'com.android.tools.build:gradle:7.3.1'
Kotlin Version: ext.kotlin_version = '1.9.0'
Unity: 2023.2.20f

Build Configuration:

minSdkVersion: 26
targetSdkVersion: 34

Troubleshooting Steps Taken:

Verified Gradle version in build.gradle and distribution URL.
Rebuilt the Unity Library with the same Gradle and SDK versions.

Request for Help:

Despite the above steps, the issue persists. Any suggestions on how to resolve this compilation error would be greatly appreciated.

Desired Outcome:

To successfully build the Flutter app and the flutter_unity_widget module without compilation errors.

[timbotimbo]

I think the issue is that you are using Unity 2023.2.20.
The current master branch isn't compatible with 2023 and 6 on Android and will throw kotlin compilation errors, as these versions contain breaking changes on android.

Unity 6 (6000) is actually the rename of 2023.3, so I would suggest to either upgrade and try the experimental unity 6 support or drop down to Unity 2022.3.

[chetu-ko]

@timbotimbo Thank you so much for the response, got it, I will try it.

[arjakroy]

I downgrade my flutter SDK version from the latest to 3.22.0. it worked for me😁

[chetu-ko]

Yes, @timbotimbo thank you, Downgrading the unity works the build, looking forward for the good support package for the new version Unity of 2023.2...

prefer using Unity version: 2022.3.43f1 this has very good working support.

[Paizee]

I downgrade my flutter SDK version from the latest to 3.22.0. it worked for me😁

Thank you!