Whenever you see this error:
error: Create list location :: there are multiple root elements . Line 2, position 2
Check the other web parts on your page and either remove the World Clock and Weather web part or another web part that might be in conflict. We have often seen scenarios where customers will customize pages or web parts and when we they upgrade World Clock and Weather to a new release, errors will occur. One thing you can do is use the web parts maintenance page within SharePoint to see all the web parts that are on a particular page. There might be conflicts with different versions of JQuery or JavaScript.
See this topic for further details: Page hangs or does not open.