I have strangest problem. Here's my repos config: ...

# spring

[Czar]

I have strangest problem. Here's my repos config:

buildscript {
	repositories {
		jcenter()
		maven(url = "<https://repo.spring.io/milestone>")
		maven(url = "<https://repo.spring.io/libs-milestone>")
		maven(url = "<https://plugins.gradle.org/m2/>")
	}
	// ...
}

When I try to switch my kotlin version from 1.1.50 to 1.2-M2, I get following error from gradle:
Could not GET '<https://repo.spring.io/libs-milestone/org/jetbrains/kotlin/kotlin-gradle-plugin/1.2-M2/kotlin-gradle-plugin-1.2-M2.pom>'. Received status code 401 from server: Unauthorized Enable Gradle 'offline mode' and sync project
I don't know if it's a Gradle or Spring issue.