[TroubleShooting] Kotlin not configured in IntelliJ

Trouble Shooting history

When I create spring-boot with Kotlin, IntelliJ can't reconize Kotlin class.

Kotlin not configured message

As a result, I added the standard library to dependency management.

build.gradle

implementation("org.jetbrains.kotlin:kotlin-stdlib")

Kotlin-stdlib has extended versions of the standard library that add support for some of the features of JDK 7 and JDK 8.

Checking https://kotlinlang.org/docs/reference/using-gradle.html#configuring-dependencies this link and choose apropriate one.