Updated to Android Studio 3.0. Getting a “Kotlin not configured” error

Question

I just updated to Android Studio 3.0 and I\'m getting this error with an existing project:

Kotlin not configured

When I go to

Answer 1

I first tried with invalidate cache/ restart option but it doesn't help me.

When I updated Kotlin to 1.1.60 in project's gradle file, problem is solved.

Also, use this in app's gradle for stdlib

implementation "org.jetbrains.kotlin:kotlin-stdlib:1.1.60" 

instead of

implementation "org.jetbrains.kotlin:kotlin-stdlib-jre7:1.1.60"

Answer 2

In my case, it was a broken update of one of the plugins I've used. Check your error logs from Android Studio this will lead you to what is the problem.

Answer 3

I have faced this issue recently... when I updated to Android Studio 3.1 .

I did a few things to fix this.

1. First I updated the Kotlin version in my app gradle file and added

   implementation "org.jetbrains.kotlin:kotlin-stdlib:1.2.31" 
   

   in my app gradle file. But this alone didn't fix it.

2. Then uninstalled the kotlin plugin from settings, restarted Android Studio and installed it again.

EDIT :

This is my project gradle file

buildscript {
   ext.kotlin_version = '1.2.31'
   repositories {
      jcenter()
      google()
    }
   dependencies {
      classpath 'com.android.tools.build:gradle:3.1.1'
      classpath 'com.google.gms:google-services:3.1.0'
      classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:1.2.31"

   }
 }

allprojects {
   repositories {
      jcenter()
      maven { url "https://jitpack.io" }
      google()
   }
}

And this is my app gradle file

apply plugin: 'com.android.application'
apply plugin: 'kotlin-android'

android {

   compileSdkVersion 27

   buildToolsVersion '27.0.3'

   defaultConfig {
       ...
    }

    buildTypes {
        ...
    }

    sourceSets {
         main.java.srcDirs += 'src/main/kotlin'
     }

     kapt { generateStubs = true }


}
repositories {
     ...
}


dependencies {
    ...
    ...
    implementation "org.jetbrains.kotlin:kotlin-stdlib:1.2.31"
    ...
    ...

 }

apply plugin: 'com.google.gms.google-services'

Answer 4

I have tried all above solutions but non of them works for me.

Then finally I got success with below solution, so it may helpful for some one like me.

1. Delele all .iml files (in root project, libraries and modules)
2. Rebuild project

Answer 5

In Android Studio, click on File -> Invalidate Caches / Restart... , then select "Invalidated and Restart". This solved my problem.

Answer 6

A common reason of the "Kotlin Not Configured" message is an internal Android Studio exception due to a bad plugin. In order to fix that you should disable the bad plugin.

When such plugin crash occurs, on the "Wellcome screen" you'll see a small notification (see illustration image) where you can click it and disable the bad plugin: