IntelliJ Gradle Plugin: The supplied javaHome seems to be invalid

Question

Similar to:
- Intellij 14 the supplied javaHome seems to be invalid
- Android Studio - supplied javaHome is not a valid folder

However, I am trying to use

Answer 1

in IntelliJ 2018.1, I ran into this problem because my project SDK was set to Kotlin instead of a JDK. So, despite having a Kotlin project, it would only build if the SDK is a JDK.