New Gradle Sync is not supported due to containing Kotlin modules using an unsupported plugin version

Faced this same error. I had to update my JVM Version in Kotlin Compiler settings.

You can find that setting here: File -> Settings -> Kotlin Compiler -> Target JVM Version

Changing to 1.8 fixed the issue.

Update Kotlin Plugin

I could be that your IDE has an older level of the Kotlin plugin.

Within Android Studio, got to File > Settings... > Kotlin and check to make sure your plugin is up to date. You may see something like this, indicating you need to update:

Also, if you run into memory issues, you may need to add org.gradle.jvmargs=-Xms1024m -Xmx4096m to the gradle.properties file.

File -> settings ->kotlin compiler->Target JVM version(update it)

This is what solved it for me in a kotlin multiplatform js/jvm/android/iOS project... took days to solve, why or how I do not know but I am greatful.