Kotlin gradle Could not initialize class class org.jetbrains.kotlin.gradle.internal.KotlinSourceSetProviderImplKt

Question

I tried to use gradle for transpiling Kotlin to Js. When I run the example from https://www.codeflow.site/fr/article/kotlin-javascript I got the error : Could not initialize class org.jetbrains.kotlin.gradle.internal.KotlinSourceSetProviderImplKt which comes from line apply plugin: 'kotlin2js' of build.gradle.

I have no idea of what the missing class is and why kotlin2js is asking for it. Any suggestion ?

Answer 1

Solved this issue by setting the latest Kotlin version (1.3.72) in build.gradle file.

buildscript {
ext {
    kotlinVersion = '1.4.20'
    springBootVersion = '2.0.4.RELEASE'
}
repositories {
    mavenCentral()
}
... 
}

Answer 2

I just had the same issue. On windows, I checked the kotlin version from the command line with gradle -v and then adjusted the kotlin version in build.gradle of my project to match my version of gradle.

I hope this works for you too.