Cortex creating admin user

Work Environment

Problem Description

I have install and configured Cortex (application.conf) and Elasticsearch (elasticsearch.yml) files. I am trying to create an admin user in Cortex but receiving the following exception.

cortex_6/_update/admin?_source=true&refresh=wait_for&routing=admin&retry_on_conflict=5
StringEntity({"script":{"source":"ctx._source[\"password\"]=params.param0;ctx._source[\"updatedBy\"]=params.param1;ctx._source[\"updatedAt\"]=params.param2","params":{"param0":"냠頤垅┑蛟뜙䧙甶࿨䡃,d1020d264a4c9b602bf895a52711df4ae569c978ae5af2c47bde9754d375e3c3","param1":"init","param2":1643826406831}}},Some(application/json))
 => ElasticError(illegal_argument_exception,request [/cortex_6/_update/admin] contains unrecognized parameters: [_source], [retry_on_conflict],None,None,None,List(ElasticError(illegal_argument_exception,request [/cortex_6/_update/admin] contains unrecognized parameters: [_source], [retry_on_conflict],None,None,None,null,None,None,None,List())),None,None,None,List())
2022-02-02 18:26:46,837 [INFO] from org.thp.cortex.services.ErrorHandler in application-akka.actor.default-dispatcher-54 - POST /api/user returned 500
org.elastic4play.InternalError: Unknown error: ElasticError(illegal_argument_exception,request [/cortex_6/_update/admin] contains unrecognized parameters: [_source], [retry_on_conflict],None,None,None,List(ElasticError(illegal_argument_exception,request [/cortex_6/_update/admin] contains unrecognized parameters: [_source], [retry_on_conflict],None,None,None,null,None,None,None,List())),None,None,None,List())
	at org.elastic4play.database.DBConfiguration.$anonfun$execute$2(DBConfiguration.scala:158)
	at scala.concurrent.Future.$anonfun$flatMap$1(Future.scala:307)
	at scala.concurrent.impl.Promise.$anonfun$transformWith$1(Promise.scala:41)
	at scala.concurrent.impl.CallbackRunnable.run(Promise.scala:64)
	at akka.dispatch.BatchingExecutor$AbstractBatch.processBatch(BatchingExecutor.scala:56)
	at akka.dispatch.BatchingExecutor$BlockableBatch.$anonfun$run$1(BatchingExecutor.scala:93)
	at scala.runtime.java8.JFunction0$mcV$sp.apply(JFunction0$mcV$sp.java:23)
	at scala.concurrent.BlockContext$.withBlockContext(BlockContext.scala:85)
	at akka.dispatch.BatchingExecutor$BlockableBatch.run(BatchingExecutor.scala:93)
	at akka.dispatch.TaskInvocation.run(AbstractDispatcher.scala:48)
	at akka.dispatch.ForkJoinExecutorConfigurator$AkkaForkJoinTask.exec(ForkJoinExecutorConfigurator.scala:48)
	at java.base/java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:290)
	at java.base/java.util.concurrent.ForkJoinPool$WorkQueue.topLevelExec(ForkJoinPool.java:1020)
	at java.base/java.util.concurrent.ForkJoinPool.scan(ForkJoinPool.java:1656)
	at java.base/java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1594)
	at java.base/java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:183)
2022-02-02 18:26:47,469 [INFO] from org.thp.cortex.services.ErrorHandler in application-akka.actor.default-dispatcher-54 - GET /api/stream/cCfmAyjxv3 returned 401
org.elastic4play.AuthenticationError: Authentication header not found
	at org.elastic4play.controllers.Authenticated.$anonfun$getFromApiKey$1(Authenticated.scala:143)
	at scala.Option.fold(Option.scala:251)
	at org.elastic4play.controllers.Authenticated.getFromApiKey(Authenticated.scala:143)
	at org.thp.cortex.controllers.StreamCtrl$$anonfun$1.applyOrElse(StreamCtrl.scala:101)
	at org.thp.cortex.controllers.StreamCtrl$$anonfun$1.applyOrElse(StreamCtrl.scala:101)
	at scala.concurrent.Future.$anonfun$recoverWith$1(Future.scala:417)
	at scala.concurrent.impl.Promise.$anonfun$transformWith$1(Promise.scala:41)
	at scala.concurrent.impl.CallbackRunnable.run(Promise.scala:64)
	at akka.dispatch.BatchingExecutor$AbstractBatch.processBatch(BatchingExecutor.scala:56)
	at akka.dispatch.BatchingExecutor$BlockableBatch.$anonfun$run$1(BatchingExecutor.scala:93)
	at scala.runtime.java8.JFunction0$mcV$sp.apply(JFunction0$mcV$sp.java:23)
	at scala.concurrent.BlockContext$.withBlockContext(BlockContext.scala:85)
	at akka.dispatch.BatchingExecutor$BlockableBatch.run(BatchingExecutor.scala:93)
	at akka.dispatch.TaskInvocation.run(AbstractDispatcher.scala:48)
	at akka.dispatch.ForkJoinExecutorConfigurator$AkkaForkJoinTask.exec(ForkJoinExecutorConfigurator.scala:48)
	at java.base/java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:290)
	at java.base/java.util.concurrent.ForkJoinPool$WorkQueue.topLevelExec(ForkJoinPool.java:1020)
	at java.base/java.util.concurrent.ForkJoinPool.scan(ForkJoinPool.java:1656)
	at java.base/java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1594)
	at java.base/java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:183)
2022-02-02 18:26:48,726 [ERROR] from org.elastic4play.controllers.Authenticated in application-akka.actor.default-dispatcher-54 - Authentication failure:
	session: AuthenticationError User session not found
	pki: AuthenticationError Certificate authentication is not configured
	key: AuthenticationError Authentication header not found
	init: AuthenticationError Use of initial user is forbidden because users exist in database
2022-02-02 18:26:48,726 [INFO] from org.thp.cortex.services.ErrorHandler in application-akka.actor.default-dispatcher-54 - POST /api/user returned 401
org.elastic4play.AuthenticationError: Authentication failure
	at org.elastic4play.controllers.Authenticated.$anonfun$getContext$4(Authenticated.scala:272)
	at scala.concurrent.Future.$anonfun$flatMap$1(Future.scala:307)
	at scala.concurrent.impl.Promise.$anonfun$transformWith$1(Promise.scala:41)
	at scala.concurrent.impl.CallbackRunnable.run(Promise.scala:64)
	at akka.dispatch.BatchingExecutor$AbstractBatch.processBatch(BatchingExecutor.scala:56)
	at akka.dispatch.BatchingExecutor$BlockableBatch.$anonfun$run$1(BatchingExecutor.scala:93)
	at scala.runtime.java8.JFunction0$mcV$sp.apply(JFunction0$mcV$sp.java:23)
	at scala.concurrent.BlockContext$.withBlockContext(BlockContext.scala:85)
	at akka.dispatch.BatchingExecutor$BlockableBatch.run(BatchingExecutor.scala:93)
	at akka.dispatch.TaskInvocation.run(AbstractDispatcher.scala:48)
	at akka.dispatch.ForkJoinExecutorConfigurator$AkkaForkJoinTask.exec(ForkJoinExecutorConfigurator.scala:48)
	at java.base/java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:290)
	at java.base/java.util.concurrent.ForkJoinPool$WorkQueue.topLevelExec(ForkJoinPool.java:1020)
	at java.base/java.util.concurrent.ForkJoinPool.scan(ForkJoinPool.java:1656)
	at java.base/java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1594)
	at java.base/java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:183)

Possible Solutions
I've tried installing different versions of Elasticsearch and still does not seem to work.

Start by reviewing the reported versions and configuration in application.conf and elasticsearch.yml, then inspect DBConfiguration.scala around line 158 and the POST /api/user path. Reproduce admin-user creation and verify that the Elasticsearch request no longer rejects parameters and the request completes without the reported 500 and 401 errors.