title: Authentication of Xamarin Studio
body: <p>I'm trying to authorise a new computer with Xamarin Studio.  When I do it generates the following error and states to contact Xamarin support with the following information.</p>
  
  <blockquote>
    <p>System.FormatException: One of the identified items was in an invalid format.
      at Xamarin.Components.Ide.Activation.ActivationService.GetErrorWorkflow (Xamarin.Components.Ide.Activation.LicenseSyncResult[] results, Boolean ignoreSyncErrors) [0x00264] in /Users/builder/data/lanes/2968/8dc6bca6/source/md-addins/Xamarin.Ide/Xamarin.Components.Ide/Activation/ActivationService.cs:762 
      at Xamarin.Components.Ide.Activation.ActivationService+c__Iterator3.MoveNext () [0x00410] in /Users/builder/data/lanes/2968/8dc6bca6/source/md-addins/Xamarin.Ide/Xamarin.Components.Ide/Activation/ActivationService.cs:654 
      at Xamarin.Components.Ide.Activation.ActivationDialog.DisplayWorkflowStep (Xamarin.Components.Ide.Activation.ActivationWorkflowStep step) [0x0002c] in /Users/builder/data/lanes/2968/8dc6bca6/source/md-addins/Xamarin.Ide/Xamarin.Components.Ide/Activation/ActivationDialog.cs:463 
      at Xamarin.Components.Ide.Activation.ActivationDialog+c__AnonStorey4.&lt;>m__0 (System.Threading.Tasks.Task t) [0x0005b] in /Users/builder/data/lanes/2968/8dc6bca6/source/md-addins/Xamarin.Ide/Xamarin.Components.Ide/Activation/ActivationDialog.cs:561 </p>
  </blockquote>