Display Server Side error message

I am using customLightBox and I am trying to figure out how to display server side error message on client.

  public static ActionResult SaveLightBoxData(FormCollection actionValues, Event evt, SearchModel searchModel)
{
  Event updateEvent = StoreInDataBase(evt,searchModel); 
  DataAction action = new DataAction(actionValues);
  action.Type = DataActionTypes.Error;
  action.Message = "Custom Message" ;
  return (new SchedulerFormResponseScript(action, updateEvent));
}
scheduler.dataProcessor.attachEvent("onAfterUpdate", function (sid, action, tid, tag) {
    if (action == "error")
    {
        dhtmlx.alert(
        {
            text: tag.text || tag.textContent,
        });
    }

when I do this, tag.text and tag.textContent are undefined. How Do I display custom error message when using customlightbox using scheduler.net mvc

Thanks
Sid

Hello,
please check the latest answer here
viewtopic.php?f=25&t=27615&p=111407#p111407

Aliaksandr,

You have mentioned previously that the fix will be available by the end of the week. Could you please confirm the fix and if we need to download could you please point us to the right location for this updated toolset.

Thanks
Sid

Hello,
sorry for the delay, we’ve updated packages on scheduler-net.com and on NuGet. You can get fixed version from there

Thank you Aliaksandr!