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

Though I see that the question already has answers that work, one might also try the following solution.

Right click on the file name (Main.kt) -> Run 'Main.kt'.

This will download a gradle file from the gradle.org website.

Wait for it to unzip. The errors were cleared.

Answer 2

just delete .idea folder from project,and run android studio again, it will resolve KOTLIN NOT CONFIGURED issue.

Answer 3

One other point to check is version of your Gradle in gradle-wrapper.properties, if you use one.

Make sure that distributionUrl=https\://services.gradle.org/distributions/gradle-4.1-all.zip

Has version 4.1 or higher.

You may also have the following in your build.gradle:

task wrapper(type: Wrapper) {
    gradleVersion = '4.1'
    distributionUrl = "https://services.gradle.org/distributions/gradle-$gradleVersion-all.zip"
}

Where Gradle version is lower that 4.1

Answer 4

None of the other solutions solved my problem. I ended up figuring out that the problem lied in the google services version. Just update it to the latest.

Top level gradle at dependencies:

classpath 'com.google.gms:google-services:4.1.0'

Answer 5

In my case, after the update of Android Studio and plugins, I could create new projects, but my old projects were having "Gradle Sync Issues".

The solution was in File/Project Structure.../App/Dependencies:

implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version" 

And then I just updated the Kotlin version in my project build.gradle:

From:

ext.kotlin_version = '1.2.30'

To:

ext.kotlin_version = '1.3.21'

Then I tried Sync again.

Obs: You can check your Kotlin version in Tools/Kotlin/Configure Kotlin Plugin Updates

Answer 6

Kotlin-stdlib-jre7 is deprecated since 1.2.0 and should be replaced with kotlin-stdlib-jdk7

implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"