Anyone got a clue what might be wrong with my setup, that I get the following error for this minimal code:

fun main() {

val (a, b) = Pair(1, "x")

}

Cannot access '<http://kotlin.io|kotlin.io>.Serializable' which is a supertype of 'kotlin.Pair'. Check your module classpath for missing or conflicting dependencies

I am using Kotlin 1.4.32 and Java 11. Thanks a lot.