Comment on Free AdSense Blogger Template by SEO Dave.
“Your template could not be parsed as it is not well-formed. Please make sure that all XML elements are closed properly. XML error message: The content of elements must consist of well-formed character data or markup.”
Means you are installing the Free Blogspot SEO/AdSense Template Rounders 2 in the new template format.
When you’ve logged into Blogspot click the Template link for the site you are working on and at the bottom of the page is a link to “Revert to classic templates”, click the link and paste the code into the template form.