Hi,
Possibly you do not have native XMLHTTP Requests enabled. Tools>Internet Options>Advance tab, uncheck "Use native XMLHTTP requests" or one of your IE Office Extensions is disabled...see Tools>Manage Addons>Show All addons.
Questions regarding Internet Explorer 8, 9 and 10 and Internet Explorer 11 for the IT Pro Audience. Topics covered are: Installation, Deployment, Configuration, Security, Group Policy, Management questions.
https://www.bing.com/search?q=XPathResult+is+Undefined
Rob^_^