AKKA 2.4.8 / Scala 2.12.0-M5 can't start system
<p>I am trying to use Scala 2.12.0-M5 and AKKA 2.4.7 in a project.  But I get this error when I try so start AKKA.  I also tried using M4.</p>

<p>I am sure I must be missing something in my setup, as this clearly must work.  But this is pretty much just what I had using 2.11.8 - 2.4.6.</p>

<p>Any help would be appreciated, thanks!</p>

<p>build.sbt:</p>

<pre><code>name := "AKKA-2.4.8"

version := "1.0"

scalaVersion := "2.12.0-M5"

// https://mvnrepository.com/artifact/com.typesafe.akka/akka-actor_2.11
libraryDependencies += "com.typesafe.akka" % "akka-actor_2.11" % "2.4.8"
</code></pre>

<p>code:</p>

<pre><code>package testing

import akka.actor.ActorSystem

/**
  * Created by on 7/8/16.&lt;br&gt;
  * &lt;br&gt;
  * AkkaActor demonstrates my problem when starting AKKA
  */
object AkkaActorStarter extends App {
  val actorSystem = ActorSystem("testAkka")
}
</code></pre>

<p>Error:</p>

<pre><code>[error] (run-main-0) java.lang.NoClassDefFoundError: scala/Product$class 
...
Caused by: java.lang.ClassNotFoundException: scala.Product$class
    at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
    at akka.util.Timeout.&lt;init&gt;(Timeout.scala:13)
    at akka.actor.ActorSystem$Settings.&lt;init&gt;(ActorSystem.scala:171)
    at akka.actor.ActorSystemImpl.&lt;init&gt;(ActorSystem.scala:522)
    at akka.actor.ActorSystem$.apply(ActorSystem.scala:142)
    at akka.actor.ActorSystem$.apply(ActorSystem.scala:109)
    at testing.AkkaActorStarter$.delayedEndpoint$testing$AkkaActorStarter$1(AkkaActorStarter.scala:11)
    at testing.AkkaActorStarter$delayedInit$body.apply(AkkaActorStarter.scala:10)
    at scala.Function0.apply$mcV$sp$(Function0.scala:34)
    at scala.Function0.apply$mcV$sp(Function0.scala:34)
    at scala.App.$anonfun$main$1$adapted(App.scala:76)
    at scala.collection.immutable.List.foreach(List.scala:376)
    at scala.App.main$(App.scala:76)
    at scala.App.main(App.scala:74)
    at testing.AkkaActorStarter.main(AkkaActorStarter.scala)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
</code></pre>