Empty iframe is dynamically create
I am working on my WordPress website and once the page has rendered, an empty iframe
<iframe style="display: none;"></iframe> is dynamically appended at the bottom of the page before the
</body> tags closes. If you run the website through the website test https://www.w3.org/WAI/standards-guidelines/wcag/, then my website fails because it generates an empty iframe. If I disable/remove
wp_footer(); then the empty iframe is not dynamically attached to the DOM. I have disabled all the
wp_enqueue_script but the iframe still exist.
Can anybody direct me where should I look for this empty iframe. Or if I am missing something.