Error on update-help

Update-Help gives following error:

Any ideas

PS C:\Windows\system32> update-help
update-help : Failed to update Help for the module(s)
'Microsoft.MonitoringAgent.PowerShell' with UI culture(s) {en-US} : For
security reasons DTD is prohibited in this XML document. To enable DTD
processing set the DtdProcessing property on XmlReaderSettings to Parse and
pass the settings into XmlReader.Create method.
At line:1 char:1
+ update-help
+ ~~~~~~~~~~~
    + CategoryInfo          : InvalidData: (:) [Update-Help], Exception
    + FullyQualifiedErrorId : HelpInfoXmlValidationFailure,Microsoft.PowerShel
   l.Commands.UpdateHelpCommand