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

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