Kotlin 1.3 with Gradle - "Kotlin not configured" error after marking the source root in intellij

I started from a regular non-Gradle Kotlin project. Then I decided later on to link my project to Gradle. I have set up my build.gradle.kts as mentioned in the Kotlin docs:

plugins { kotlin("jvm") version "1.3.72" } repositories { mavenCentral() } dependencies { implementation(kotlin("stdlib")) } 

The build was successful. However, Intellij could no longer recognize my Kotlin modules (no syntax highlighting, etc.). Even the option of creating new Kotlin files was no longer available. So I thought maybe I just needed to mark the src directory as the Source Root, but the error "Kotlin not configured" appeared at the top.

Is there something wrong with my build? I'm still new to Gradle. I've tried other solutions like invalidating the cache and changing the dependencies but none of them seemed to work.

3 Answers

I closed my project, and then I ran:

rm -rf .idea .gradle gradle 

and then it worked again

I also did face this problem suddenly. I solve this by

Invalidate Caches and Restart

Go to the top left File>Invalidate Caches... It may not help in your case.

This happened to me while trying to convert a Java file into Kotlin, with a message saying there was no configuration available.

It turned out that this was caused by having the Java file in a non-source folder.