My daily Jenkins build failed

Could not HEAD '<https://plugins.gradle.org/m2/org/gradle/kotlin/kotlin-dsl/org.gradle.kotlin.kotlin-dsl.gradle.plugin/1.0-rc-12/org.gradle.kotlin.kotlin-dsl.gradle.plugin-1.0-rc-12.jar>'.

Has this jar been removed just recently? Nothing changed in the codebase, this is the daily build rebuilding the same stuff, and now it fails I checked and yes, this jar actually does not exist, but it should not be important as it's supposed to be part of Gradle 5.0-M1 itself, and it just worked in the Friday build