System Management crashes when selecting Security Groups

[CSX8600]

System.NullReferenceException: Object reference not set to an instance of an object.
   at MesaSuite.Common.Data.DataAccess.HandleResponseWebException(WebException ex, ResponseWebExceptionRetryCallback retryCallback)
   at MesaSuite.Common.Data.PatchData.<InternalExecute>d__14.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at MesaSuite.Common.Data.PatchData.<Execute>d__13.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at SystemManagement.frmSelectSecurityGroups.<cmdSave_Click>d__16.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.AsyncMethodBuilderCore.<>c.<ThrowAsync>b__6_0(Object state)