Circular csv feeder giving IllegalStateException: Feeder is now empty, stopping engine - scala

Question

I am using a feeder to plug in values in a request body.
val feeder = csv("feeders/project_tenants.csv").circular
def updateDbSettings = feed(feeder)
exec(http("Update Project Settings")
.post("/url/here")
.body(StringBody("""{"sqlServer":"${server}.test.int","sqlDatabase":"COMP_DB", "dataCenter":"HAI"}""")).asJson)
My csv file looks like this
server,test
check,a
check1,b
check2,c
check3,d
Each time I run the test I'm getting IllegalStateException: Feeder is now empty, stopping engine exception which I don't understand because my feeder is circular. I understand that should mean the values will iterate over again once reaching the end of the file. But even if I load only one session I get that error.
Stacktrace with a single user per one second:
14:18:39.076 [ERROR] i.g.a.Gatling$ - Run crashed
java.lang.IllegalStateException: Feeder is now empty, stopping engine
at io.gatling.core.action.SingletonFeed$$anonfun$receive$1.applyOrElse(SingletonFeed.scala:67)
at akka.actor.Actor.aroundReceive(Actor.scala:539)
at akka.actor.Actor.aroundReceive$(Actor.scala:537)
at io.gatling.core.akka.BaseActor.aroundReceive(BaseActor.scala:25)
at akka.actor.ActorCell.receiveMessage(ActorCell.scala:612)
at akka.actor.ActorCell.invoke(ActorCell.scala:581)
at akka.dispatch.Mailbox.processMailbox(Mailbox.scala:268)
at akka.dispatch.Mailbox.run(Mailbox.scala:229)
at akka.dispatch.Mailbox.exec(Mailbox.scala:241)
java.lang.reflect.InvocationTargetException
at akka.dispatch.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260)
at akka.dispatch.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1339)
at akka.dispatch.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at akka.dispatch.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107)
at java.base/java.lang.reflect.Method.invoke(Method.java:566)
at io.gatling.mojo.MainWithArgsInFile.runMain(MainWithArgsInFile.java:50)
at io.gatling.mojo.MainWithArgsInFile.main(MainWithArgsInFile.java:33)
Caused by: java.lang.IllegalStateException: Feeder is now empty, stopping engine
[ERROR] [07/25/2022 14:18:39.118] [GatlingSystem-akka.actor.default-dispatcher-7] [akka.actor.ActorSystemImpl(GatlingSystem)] ex at io.gatling.core.action.SingletonFeed$$anonfun$receive$1.applyOrElse(SingletonFeed.scala:67)
ception while executing timer task
at akka.actor.Actor.aroundReceive(Actor.scala:539)
java.lang.NullPointerException
at io.gatling.core.akka.BaseActor.system(BaseActor.scala:27)
at akka.actor.Actor.aroundReceive$(Actor.scala:537)
at io.gatling.graphite.sender.TcpSender.askForConnection(TcpSender.scala:103)
at io.gatling.core.akka.BaseActor.aroundReceive(BaseActor.scala:25)
at io.gatling.graphite.sender.TcpSender$$anonfun$1.$anonfun$applyOrElse$1(TcpSender.scala:58)
at akka.actor.ActorCell.receiveMessage(ActorCell.scala:612)
at akka.actor.Scheduler$$anon$4.run(Scheduler.scala:202)
at akka.actor.ActorCell.invoke(ActorCell.scala:581)
at akka.actor.LightArrayRevolverScheduler$TaskHolder.run(LightArrayRevolverScheduler.scala:343)
at akka.actor.LightArrayRevolverScheduler.$anonfun$close$1(LightArrayRevolverScheduler.scala:145)
at akka.dispatch.Mailbox.processMailbox(Mailbox.scala:268)
at akka.dispatch.Mailbox.run(Mailbox.scala:229)
at akka.actor.LightArrayRevolverScheduler.$anonfun$close$1$adapted(LightArrayRevolverScheduler.scala:144)
at akka.dispatch.Mailbox.exec(Mailbox.scala:241)
at scala.collection.Iterator.foreach(Iterator.scala:941)
at akka.dispatch.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260)
at akka.dispatch.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1339)
at scala.collection.Iterator.foreach$(Iterator.scala:941)
at akka.dispatch.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979)
at scala.collection.AbstractIterator.foreach(Iterator.scala:1429)
at akka.dispatch.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107)
at scala.collection.IterableLike.foreach(IterableLike.scala:74)
at scala.collection.IterableLike.foreach$(IterableLike.scala:73)
at scala.collection.AbstractIterable.foreach(Iterable.scala:56)
at akka.actor.LightArrayRevolverScheduler.close(LightArrayRevolverScheduler.scala:144)
at akka.actor.ActorSystemImpl.stopScheduler(ActorSystem.scala:980)
at akka.actor.ActorSystemImpl.$anonfun$_start$1(ActorSystem.scala:910)
at scala.runtime.java8.JFunction0$mcV$sp.apply(JFunction0$mcV$sp.java:23)
at akka.actor.ActorSystemImpl$$anon$2.run(ActorSystem.scala:931)
at akka.actor.ActorSystemImpl$TerminationCallbacks$$anonfun$addRec$1$1.applyOrElse(ActorSystem.scala:1118)
at akka.actor.ActorSystemImpl$TerminationCallbacks$$anonfun$addRec$1$1.applyOrElse(ActorSystem.scala:1118)
at scala.concurrent.Future.$anonfun$andThen$1(Future.scala:536)
at scala.concurrent.impl.Promise.liftedTree1$1(Promise.scala:33)
at scala.concurrent.impl.Promise.$anonfun$transform$1(Promise.scala:33)
at scala.concurrent.impl.CallbackRunnable.run(Promise.scala:64)
at akka.dispatch.BatchingExecutor$AbstractBatch.processBatch(BatchingExecutor.scala:55)
at akka.dispatch.BatchingExecutor$BlockableBatch.$anonfun$run$1(BatchingExecutor.scala:92)
at scala.runtime.java8.JFunction0$mcV$sp.apply(JFunction0$mcV$sp.java:23)
at scala.concurrent.BlockContext$.withBlockContext(BlockContext.scala:85)
at akka.dispatch.BatchingExecutor$BlockableBatch.run(BatchingExecutor.scala:92)
at akka.dispatch.TaskInvocation.run(AbstractDispatcher.scala:41)
at akka.dispatch.ForkJoinExecutorConfigurator$AkkaForkJoinTask.exec(ForkJoinExecutorConfigurator.scala:49)
at akka.dispatch.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260)
at akka.dispatch.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1339)
at akka.dispatch.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979)
at akka.dispatch.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107)