Do you have any idea why I do get this erro?

package List12 import akka.actor.Actor import akka .actor.Props import akka.event.Logging import akka.actor. {Actor, Props) import akka.actor.. import akka.actor.typed. ActorSystem import akka.event.Logging I class testActor extends Actor { vel log =Logging(context.systen, this) 3 1 2 override def receive: Receive = { case s: String => println("Message has been received.") case i: Int => println(i + this is the number") 24 25 26 def too: Unit - println("Normal method is running.") } object Main extends App { 28 29 36 31 32 33 34 val system - ActorSystem("My Systen.") vel actor system.sotorf (Propsiyoton],"myActor") 35 36 37 38 39 40 41 emperor Stutt Politechnika Diagram Software ... Computing Thoughts Remote Job and St akka TOMS println(s"${self.path) received pong, count down $countDown") if (countDown > 0) { countDown -= 1 sender() ! Ping } else { sender() ! PoisonPill self ! PoisonPill } 1 class Ponger (pinger: Actor Ref) extends Actor def receive = { case Ping => println(s"${self.path) received ping") pinger ! Pong val system - ActorSystem("pingpong") val pinger = system.actor of (Props [Pinger], "pinger") val ponger = system.actor of (Props (classof (Ponger], pinger), "ponger") import system.dispatcher system. scheduler scheduleOnce(500 millis) { ponger Ping Props Props is a configuration class to specify options for the creation of actors, think of it as an immutable ar reely shareable recipe for creating an actor including associated deployment information (eg, which dis use, see more below). Here are some examples of how to create a Props Instance. Scala lava package List12 import akka.actor.Actor import akka .actor.Props import akka.event.Logging import akka.actor. {Actor, Props) import akka.actor.. import akka.actor.typed. ActorSystem import akka.event.Logging I class testActor extends Actor { vel log =Logging(context.systen, this) 3 1 2 override def receive: Receive = { case s: String => println("Message has been received.") case i: Int => println(i + this is the number") 24 25 26 def too: Unit - println("Normal method is running.") } object Main extends App { 28 29 36 31 32 33 34 val system - ActorSystem("My Systen.") vel actor system.sotorf (Propsiyoton],"myActor") 35 36 37 38 39 40 41 emperor Stutt Politechnika Diagram Software ... Computing Thoughts Remote Job and St akka TOMS println(s"${self.path) received pong, count down $countDown") if (countDown > 0) { countDown -= 1 sender() ! Ping } else { sender() ! PoisonPill self ! PoisonPill } 1 class Ponger (pinger: Actor Ref) extends Actor def receive = { case Ping => println(s"${self.path) received ping") pinger ! Pong val system - ActorSystem("pingpong") val pinger = system.actor of (Props [Pinger], "pinger") val ponger = system.actor of (Props (classof (Ponger], pinger), "ponger") import system.dispatcher system. scheduler scheduleOnce(500 millis) { ponger Ping Props Props is a configuration class to specify options for the creation of actors, think of it as an immutable ar reely shareable recipe for creating an actor including associated deployment information (eg, which dis use, see more below). Here are some examples of how to create a Props Instance. Scala lava