Hi, 
I started upgrading k2 from 5.3 to 5.4 with setup manager, the problem is on Register Environment step, after few minutes I got this problem: 

ActionGroup.Execute: Logged Error: Group run failed with exception: System.FormatException: Input string was not in a correct format.
   at System.Text.StringBuilder.FormatError()
   at System.Text.StringBuilder.AppendFormatHelper(IFormatProvider provider, String format, ParamsArray args)
   at System.String.FormatHelper(IFormatProvider provider, String format, ParamsArray args)
   at System.String.Format(IFormatProvider provider, String format, Objectm] args)
   at System.IO.TextWriter.WriteLine(String format, Objecto] arg)
   at System.IO.TextWriter.SyncTextWriter.WriteLine(String format, Object ] arg)
   at SourceCode.Install.Logging.Log.WriteError(String msg, Objectt] messageArgs)
   at SourceCode.Install.Package.Actions.AnalyzableAction.PopulateValidateAndExecute(Target target)
   at SourceCode.Install.Package.Targets.Target.Execute()
   at SourceCode.Install.Package.Actions.ActionGroup.Execute(Target target)