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.