Outlook error

{
  "Body": {
    "ErrorCode": 500,
    "FaultMessage": "id cannot be null or empty",
    "IsTransient": false,
    "StackTrace": "System.ArgumentException: id cannot be null or empty\u000d\u000a   at Microsoft.Exchange.Clients.Owa2.Server.Core.AttachmentRetriever.CreateInstance(String id, CallContext callContext)\u000d\u000a   at Microsoft.Exchange.Clients.Owa2.Server.Core.GetAttachment.InternalExecute()\u000d\u000a   at Microsoft.Exchange.Services.Wcf.ServiceCommand`1.DetectDuplicatedCallOrExecute()\u000d\u000a   at Microsoft.Exchange.Services.Wcf.ServiceCommand`1.Execute()\u000d\u000a   at Microsoft.Exchange.Clients.Owa2.Server.Core.OWAService.GetFileAttachment(String id, Boolean isImagePreview, Boolean asDataUri)\u000d\u000a   at SyncInvokeGetFileAttachment(Object , Object[] , Object[] )\u000d\u000a   at System.ServiceModel.Dispatcher.SyncMethodInvoker.Invoke(Object instance, Object[] inputs, Object[]& outputs)\u000d\u000a   at System.ServiceModel.Dispatcher.DispatchOperationRuntime.InvokeBegin(MessageRpc& rpc)\u000d\u000a   at System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.ProcessMessage5(MessageRpc& rpc)\u000d\u000a   at System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.ProcessMessage31(MessageRpc& rpc)\u000d\u000a   at System.ServiceModel.Dispatcher.MessageRpc.Process(Boolean isOperationContextSet)"
  }
}