2170303 - "This page can't be displayed" when browsing to the Afaria Admin UI

• A user sees "This page can't be displayed" when browsing to the Afaria Admin UI in Internet Explorer 11.
• The following error is seen in the Event Viewer logs:
  
  Event code: 3005
  Event message: An unhandled exception has occurred.
  Event time: 5/4/2015 11:23:43 AM
  Event time (UTC): 5/4/2015 3:23:43 PM
  Event ID: 85c9b99f1dbe4956a58cd926131ed848
  Event sequence: 1462
  Event occurrence: 485
  Event detail code: 0

  Application information:
  Application domain: /LM/W3SVC/1/ROOT/<Afaria>
  Trust level: Full
  Application Virtual Path: /Afaria
  Application Path: <AfariaInstallPath>
  Machine name: <MachineName>

  Process information:
  Process ID: 3792
  Process name: w3wp.exe
  Account name: NT AUTHORITY\SYSTEM

  Exception information:
  Exception type: ArgumentOutOfRangeException
  Exception message: StartIndex cannot be less than zero.
  Parameter name: startIndex

  Request information:
  Request URL: http://localhost/Afaria/default.aspx
  Request path: /Afaria/default.aspx
  User host address: ::1
  User: FOS\whatsup
  Is authenticated: True
  Authentication Type: Negotiate
  Thread account name: NT AUTHORITY\SYSTEM

  Thread information:
  Thread ID: 4
  Thread account name: NT AUTHORITY\SYSTEM
  Is impersonating: True
  Stack trace: at System.String.InternalSubStringWithChecks(Int32 startIndex, Int32 length, Boolean fAlwaysCopy)
  at XcelleNet.Afaria.Webforms.Global.Session_Start(Object sender, EventArgs e)
  at System.Web.SessionState.SessionStateModule.RaiseOnStart(EventArgs e)
  at System.Web.SessionState.SessionStateModule.CompleteAcquireState()
  at System.Web.SessionState.SessionStateModule.BeginAcquireState(Object source, EventArgs e, AsyncCallback cb, Object extraData)
  at System.Web.HttpApplication.AsyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
  at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)

SAP Afaria 6.6 Feature Pack 1

KBA , MOB-AFA , Afaria , Problem