Role center error in ax 2012 r3

An unhandled error has occurred. To view details about this error, enable debugging in the web.config file or view the Windows event logs.

The following system error occurred: A specified logon session does not exist. It may already have been terminated.

Microsoft SQL Server 2012 Analysis Services

at Microsoft.AnalysisServices.AdomdClient.AdomdConnection.XmlaClientProvider.Microsoft.AnalysisServices.AdomdClient.AdomdConnection.IXmlaClientProviderEx.CreateSession(Boolean sendNamespaceCompatibility)
at Microsoft.AnalysisServices.AdomdClient.AdomdConnection.ConnectToXMLA(Boolean createSession, Boolean isHTTP)
at Microsoft.AnalysisServices.AdomdClient.AdomdConnection.Open()
at Microsoft.Dynamics.Framework.Portal.UI.WebControls.AnalysisServerHelper.CreateAndOpenConnection(Boolean applyEffectiveUserName, String connectionString)
at Microsoft.Dynamics.Framework.Portal.UI.WebControls.AnalysisServerHelper.ExecuteQuery(String mdxQuery, IEnumerable`1 userParameters)
at CustCashInflowvsCashOutflow.GetCompanyAccountingCurrency() in c:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\14\TEMPLATE\LAYOUTS\ep\CustCashInflowvsCashOutflow.ascx.cs:line 72
at CustCashInflowvsCashOutflow.SetDefaultReportParameterValues() in c:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\14\TEMPLATE\LAYOUTS\ep\CustCashInflowvsCashOutflow.ascx.cs:line 49
at CustCashInflowvsCashOutflow.Page_Load(Object sender, EventArgs e) in c:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\14\TEMPLATE\LAYOUTS\ep\CustCashInflowvsCashOutflow.ascx.cs:line 22
at System.Web.Util.CalliHelper.EventArgFunctionCaller(IntPtr fp, Object o, Object t, EventArgs e)
at System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e)
at System.Web.UI.Control.OnLoad(EventArgs e)
at System.Web.UI.Control.LoadRecursive()
at System.Web.UI.Control.LoadRecursive()
at System.Web.UI.Control.LoadRecursive()
at System.Web.UI.Control.LoadRecursive()
at System.Web.UI.Control.LoadRecursive()
at System.Web.UI.Control.LoadRecursive()
at System.Web.UI.Control.LoadRecursive()
at System.Web.UI.Control.LoadRecursive()
at System.Web.UI.Control.LoadRecursive()
at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)