Hi Blake. Thanks for your help.

The version is 10.4.223.

In the event viewer, I also noticed that I had connection errors with the server (I should point out that the Workflow server is on the same machine as the Laserfiche server).

Could this be the cause of the problem?

Timestamp: 2023-11-14 12:00:38.296

Local Time: 14/11/2023 02:00:38

Category: Errors

Machine: SRV-LF

Severity: Error

Application Domain: Laserfiche.Workflow.Subscriber.exe

Process Id: 4600

Process Name: C:\Program Files\Laserfiche\Laserfiche Workflow 9\Laserfiche.Workflow.Subscriber.exe

Win32 Thread Id: 7128 - Stats thread

Thread Name: Stats thread

Message: <Exception handlingInstanceId="39c2b64a-4c4c-428a-9bf5-7c0cc9a1c830">
  <Description>An exception of type 'Laserfiche.Workflow.WorkflowServerNotFoundException' occurred and was caught.</Description>
  <DateTime>2023-11-14 02:00:38Z</DateTime>
  <ExceptionType>Laserfiche.Workflow.WorkflowServerNotFoundException, Laserfiche.Workflow.ServerObjects, Version=8.3.0.0, Culture=neutral, PublicKeyToken=d8428ff9263e6cda</ExceptionType>
  <Message>Impossible de créer la connexion au Serveur Workflow 'localhost'.</Message>
  <Source>Laserfiche.Workflow.ServerObjects</Source>
  <HelpLink />
  <Property name="Server">localhost</Property>
  <Property name="Trace" />
  <Property name="IsCommunicationError">True</Property>
  <Property name="ServerExceptionType" />
  <Property name="TargetSite">Laserfiche.Workflow.Connection.ConnectionResults Connect(Laserfiche.Workflow.Connection.ConnectionOptions)</Property>
  <Property name="HResult">-2146233088</Property>
  <StackTrace>Client trace
   à Laserfiche.Workflow.Internal.WorkflowServerClient.Connect(ConnectionOptions options)
   à Laserfiche.Workflow.WorkflowConnection.Connect()
   à Laserfiche.Workflow.WorkflowApplication.ConnectToServer(WorkflowConnection connection)
   à Laserfiche.Workflow.WorkflowApplication.Open()
   à Laserfiche.Workflow.Subscriber.Runtime.WorkflowServerCommandExecutor.RestoreConnection()
</StackTrace>
  <additionalInfo>
    <info name="MachineName" value="SRV-LF" />
    <info name="TimeStamp" value="14/11/2023 12:00:38" />
    <info name="FullName" value="Microsoft.Practices.EnterpriseLibrary.ExceptionHandling, Version=5.0.414.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" />
    <info name="AppDomainName" value="Laserfiche.Workflow.Subscriber.exe" />
    <info name="ThreadIdentity" value="" />
    <info name="WindowsIdentity" value="AUTORITE NT\Système" />
  </additionalInfo>
  <InnerException>
    <ExceptionType>System.ServiceModel.EndpointNotFoundException, System.ServiceModel, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</ExceptionType>
    <Message>Connexion à net.tcp://localhost:8085/ManagementService impossible. La tentative de connexion a duré pendant une période de 00:00:02.2811896. Code d'erreur TCP 10061 : Aucune connexion n’a pu être établie car l’ordinateur cible l’a expressément refusée 127.0.0.1:8085. </Message>
    <Source>mscorlib</Source>
    <HelpLink />
    <Property name="TargetSite">Void HandleReturnMessage(System.Runtime.Remoting.Messaging.IMessage, System.Runtime.Remoting.Messaging.IMessage)</Property>
    <Property name="HResult">-2146233087</Property>
    <StackTrace>
Server stack trace: 
   à System.ServiceModel.Channels.SocketConnectionInitiator.Connect(Uri uri, TimeSpan timeout)
   à System.ServiceModel.Channels.BufferedConnectionInitiator.Connect(Uri uri, TimeSpan timeout)
   à System.ServiceModel.Channels.ConnectionPoolHelper.EstablishConnection(TimeSpan timeout)
   à System.ServiceModel.Channels.ClientFramingDuplexSessionChannel.OnOpen(TimeSpan timeout)
   à System.ServiceModel.Channels.CommunicationObject.Open(TimeSpan timeout)
   à System.ServiceModel.Channels.ServiceChannel.OnOpen(TimeSpan timeout)
   à System.ServiceModel.Channels.CommunicationObject.Open(TimeSpan timeout)
   à System.ServiceModel.Channels.ServiceChannel.CallOpenOnce.System.ServiceModel.Channels.ServiceChannel.ICallOnce.Call(ServiceChannel channel, TimeSpan timeout)
   à System.ServiceModel.Channels.ServiceChannel.CallOnceManager.CallOnce(TimeSpan timeout, CallOnceManager cascade)
   à System.ServiceModel.Channels.ServiceChannel.EnsureOpened(TimeSpan timeout)
   à System.ServiceModel.Channels.ServiceChannel.Call(String action, Boolean oneway, ProxyOperationRuntime operation, Object[] ins, Object[] outs, TimeSpan timeout)
   à System.ServiceModel.Channels.ServiceChannelProxy.InvokeService(IMethodCallMessage methodCall, ProxyOperationRuntime operation)
   à System.ServiceModel.Channels.ServiceChannelProxy.Invoke(IMessage message)

Exception rethrown at [0]: 
   à System.Runtime.Remoting.Proxies.RealProxy.HandleReturnMessage(IMessage reqMsg, IMessage retMsg)
   à System.Runtime.Remoting.Proxies.RealProxy.PrivateInvoke(MessageData&amp; msgData, Int32 type)
   à Laserfiche.Workflow.IWorkflowServerApi.Connect(ConnectionOptions options)
   à Laserfiche.Workflow.Internal.WorkflowServerClient.EnsureChannelReady()
   à Laserfiche.Workflow.Internal.WorkflowServerClient.Connect(ConnectionOptions options)</StackTrace>
    <InnerException>
      <ExceptionType>System.Net.Sockets.SocketException, System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</ExceptionType>
      <Message>Aucune connexion n’a pu être établie car l’ordinateur cible l’a expressément refusée 127.0.0.1:8085</Message>
      <Source>System</Source>
      <HelpLink />
      <Property name="ErrorCode">10061</Property>
      <Property name="SocketErrorCode">ConnectionRefused</Property>
      <Property name="NativeErrorCode">10061</Property>
      <Property name="TargetSite">Void DoConnect(System.Net.EndPoint, System.Net.SocketAddress)</Property>
      <Property name="HResult">-2147467259</Property>
      <StackTrace>   à System.Net.Sockets.Socket.DoConnect(EndPoint endPointSnapshot, SocketAddress socketAddress)
   à System.Net.Sockets.Socket.Connect(EndPoint remoteEP)
   à System.ServiceModel.Channels.SocketConnectionInitiator.Connect(Uri uri, TimeSpan timeout)</StackTrace>
    </InnerException>
  </InnerException>
</Exception>