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kotlinlang

I am trying to upgrade project from java 17 to java 21. Gradle version is 8.4. I have done the same on another project fra 17 to 21 and gradle version was also 8.4. But in this project I got this error:
```FAILURE: Build failed with an exception.

* What went wrong:
Could not determine the dependencies of task ':compileKotlin'.
> Unknown Kotlin JVM target: 21```
```kotlin {
    jvmToolchain {
        languageVersion.set(JavaLanguageVersion.of(21))
    }
}```
Anyone know how I can solve this issues?

Please make sure you are using Kotlin Gradle plugin 1.9.20. Otherwise you need to explicetly specify jvm target with lower version

I did not see that tiny change hehe :slightly_smiling_face: Thank you!