Getting these errors on virtually every page read, and the site is really dragging - though it seems, in the end, to be displaying correct content and work normally but for slowness, sometimes extreme.

Can someone suggest a cause and a cure?


Message: System.NullReferenceException: Object reference not set to an instance of an object. at System.Xml.XmlNodeReaderNavigator..ctor(XmlNode node) at System.Xml.XmlNodeReader.Init(XmlNode node) at System.Xml.XmlNodeReader..ctor(XmlNode node) at DotNetNuke.Modules.Xml.Providers.XmlDataProvider.HttpRequest.Provider.GetXmlContent(String contentUrl, Credential credential, Boolean useCache) at DotNetNuke.Modules.Xml.Providers.XmlDataProvider.HttpRequest.Provider.Load(Int32 moduleId, Int32 portalId, Hashtable settings)

DNN 6.2.6