Have you tried just starting a brand new kotlin project in IDEA and seeing if that just works? If that doesn’t work, then there’s a deeper issue. If that does work, then it’s a Gradle configuration issue.

I will try this and revert back

can you post your

build.gradle

file?

Here it is:

buildscript {
    ext.kotlin_version = '1.2.41'

    repositories {
        mavenCentral()
    }
    dependencies {
        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
    }
}

plugins {
    id 'java'
}

group 'com.practice'
version '1.0-SNAPSHOT'

apply plugin: 'kotlin'

sourceCompatibility = 1.8

repositories {
    mavenCentral()
}

dependencies {
    compile "org.jetbrains.kotlin:kotlin-stdlib-jdk8:$kotlin_version"
    testCompile group: 'junit', name: 'junit', version: '4.12'
}

compileKotlin {
    kotlinOptions.jvmTarget = "1.8"
}
compileTestKotlin {
    kotlinOptions.jvmTarget = "1.8"
}

Try manually setting your

buildDir

to the file path where your project resides.