Error in after startup

After opening a branch and starting it I suddenly get the error below in the afterstartup action. Anybody a guess what could be the cause of this? 

Regards,

Ronald

[EDIT]

To clarify, the breakpoint on the afterstartup microflow is not even triggered. The error is already before the actual start op the startup microflow.

com.mendix.core.CoreException: com.mendix.core.CoreRuntimeException: com.mendix.systemwideinterfaces.MendixRuntimeException: akka.pattern.AskTimeoutException: Ask timed out on [Actor[akka://MxRuntimeSystem/user/dispatchSupervisor#397653996]] after [604800000 ms]
	at com.mendix.core.component.InternalCore.execute(InternalCore.java:365)

Caused by: com.mendix.core.CoreRuntimeException: com.mendix.systemwideinterfaces.MendixRuntimeException: akka.pattern.AskTimeoutException: Ask timed out on [Actor[akka://MxRuntimeSystem/user/dispatchSupervisor#397653996]] after [604800000 ms]
	at com.mendix.core.actionmanagement.ActionManager.executeSync(ActionManager.java:176)

Caused by: com.mendix.systemwideinterfaces.MendixRuntimeException: akka.pattern.AskTimeoutException: Ask timed out on [Actor[akka://MxRuntimeSystem/user/dispatchSupervisor#397653996]] after [604800000 ms]
	at com.mendix.util.classloading.Runner.doRunUsingClassLoaderOf(Runner.java:40)

Caused by: akka.pattern.AskTimeoutException: Ask timed out on [Actor[akka://MxRuntimeSystem/user/dispatchSupervisor#397653996]] after [604800000 ms]
	at akka.pattern.PromiseActorRef$$anonfun$1.apply$mcV$sp(AskSupport.scala:333)
	at akka.actor.Scheduler$$anon$7.run(Scheduler.scala:117)
	at akka.actor.LightArrayRevolverScheduler$TaskHolder.run(Scheduler.scala:476)
	at akka.actor.LightArrayRevolverScheduler$$anonfun$close$1.apply(Scheduler.scala:282)
	at akka.actor.LightArrayRevolverScheduler$$anonfun$close$1.apply(Scheduler.scala:281)
	at scala.collection.Iterator$class.foreach(Iterator.scala:742)
	at scala.collection.AbstractIterator.foreach(Iterator.scala:1194)
	at scala.collection.IterableLike$class.foreach(IterableLike.scala:72)
	at scala.collection.AbstractIterable.foreach(Iterable.scala:54)
	at akka.actor.LightArrayRevolverScheduler.close(Scheduler.scala:280)
	at akka.actor.ActorSystemImpl.stopScheduler(ActorSystem.scala:687)
	at akka.actor.ActorSystemImpl$$anonfun$liftedTree2$1$1.apply$mcV$sp(ActorSystem.scala:616)
	at akka.actor.ActorSystemImpl$$anonfun$liftedTree2$1$1.apply(ActorSystem.scala:616)
	at akka.actor.ActorSystemImpl$$anonfun$liftedTree2$1$1.apply(ActorSystem.scala:616)
	at akka.actor.ActorSystemImpl$$anon$3.run(ActorSystem.scala:640)
	at akka.actor.ActorSystemImpl$TerminationCallbacks$$anonfun$run$1.runNext$1(ActorSystem.scala:807)
	at akka.actor.ActorSystemImpl$TerminationCallbacks$$anonfun$run$1.apply$mcV$sp(ActorSystem.scala:810)
	at akka.actor.ActorSystemImpl$TerminationCallbacks$$anonfun$run$1.apply(ActorSystem.scala:803)
	at akka.actor.ActorSystemImpl$TerminationCallbacks$$anonfun$run$1.apply(ActorSystem.scala:803)
	at akka.util.ReentrantGuard.withGuard(LockUtil.scala:15)
	at akka.actor.ActorSystemImpl$TerminationCallbacks.run(ActorSystem.scala:803)
	at akka.actor.ActorSystemImpl$$anonfun$terminationCallbacks$1.apply(ActorSystem.scala:637)
	at akka.actor.ActorSystemImpl$$anonfun$terminationCallbacks$1.apply(ActorSystem.scala:637)
	at scala.concurrent.impl.CallbackRunnable.run(Promise.scala:32)
	at akka.dispatch.BatchingExecutor$Batch$$anonfun$run$1.processBatch$1(BatchingExecutor.scala:67)
	at akka.dispatch.BatchingExecutor$Batch$$anonfun$run$1.apply$mcV$sp(BatchingExecutor.scala:82)
	at akka.dispatch.BatchingExecutor$Batch$$anonfun$run$1.apply(BatchingExecutor.scala:59)
	at akka.dispatch.BatchingExecutor$Batch$$anonfun$run$1.apply(BatchingExecutor.scala:59)
	at scala.concurrent.BlockContext$.withBlockContext(BlockContext.scala:72)
	at akka.dispatch.BatchingExecutor$Batch.run(BatchingExecutor.scala:58)
	at akka.dispatch.TaskInvocation.run(AbstractDispatcher.scala:41)
	at akka.dispatch.ForkJoinExecutorConfigurator$AkkaForkJoinTask.exec(AbstractDispatcher.scala:393)
	at scala.concurrent.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260)
	at scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1339)
	at scala.concurrent.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979)
	at scala.concurrent.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107)