Ошибка SetupWebSocketConnectionParams при входе

Exception Message: Object reference not set to an instance of an object.
Exception Type: System.NullReferenceException
Exception Source: Terrasoft.Messaging.Common

Exception Stack Trace:
   at Terrasoft.Messaging.Common.ClientChannelHelper.GetConnectionParamsInitScript(Uri appUrl)
   at Terrasoft.WebApp.Nui.ViewModule.SetupWebSocketConnectionParams()
   at Terrasoft.WebApp.Nui.ViewModule.Page_Load(Object sender, EventArgs e)
   at System.Web.UI.Control.OnLoad(EventArgs e)
   at System.Web.UI.Control.LoadRecursive()
   at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)