The first element has not yet passed through in 5000 milliseconds

[md-sam123]

I am new to lagom scala. Created a simple crud to learn the key concept of it. First I compiled my code using sbt clean compile and it successfully compiled the code. After that I tried to run the project using sbt clean runAll command. Sometimes service started without any problem. But sometimes I found a message saying that
java.util.concurrent.TimeoutException: The first element has not yet passed through in 5000 milliseconds. at akka.stream.impl.Timers$Initial$$anon$1.onTimer(Timers.scala:62) at akka.stream.stage.TimerGraphStageLogic.onInternalTimer(GraphStage.scala:1601) at akka.stream.stage.TimerGraphStageLogic.$anonfun$getTimerAsyncCallback$1(GraphStage.scala:1590) at akka.stream.stage.TimerGraphStageLogic.$anonfun$getTimerAsyncCallback$1$adapted(GraphStage.scala:1590) at akka.stream.impl.fusing.GraphInterpreter.runAsyncInput(GraphInterpreter.scala:466) at akka.stream.impl.fusing.GraphInterpreterShell$AsyncInput.execute(ActorGraphInterpreter.scala:497) at akka.stream.impl.fusing.GraphInterpreterShell.processEvent(ActorGraphInterpreter.scala:599) at akka.stream.impl.fusing.ActorGraphInterpreter.akka$stream$impl$fusing$ActorGraphInterpreter$$processEvent(ActorGraphInterpreter.scala:768) at akka.stream.impl.fusing.ActorGraphInterpreter$$anonfun$receive$1.applyOrElse(ActorGraphInterpreter.scala:783) at akka.actor.Actor.aroundReceive(Actor.scala:534) at akka.actor.Actor.aroundReceive$(Actor.scala:532) at akka.stream.impl.fusing.ActorGraphInterpreter.aroundReceive(ActorGraphInterpreter.scala:690) at akka.actor.ActorCell.receiveMessage(ActorCell.scala:573) at akka.actor.ActorCell.invoke(ActorCell.scala:543) at akka.dispatch.Mailbox.processMailbox(Mailbox.scala:269) at akka.dispatch.Mailbox.run(Mailbox.scala:230) at akka.dispatch.Mailbox.exec(Mailbox.scala:242) at java.util.concurrent.ForkJoinTask.doExec(Unknown Source) at java.util.concurrent.ForkJoinPool$WorkQueue.runTask(Unknown Source) at java.util.concurrent.ForkJoinPool.runWorker(Unknown Source) at java.util.concurrent.ForkJoinWorkerThread.run(Unknown Source)