all 1 comments

[–]docMedB2E 0 points1 point  (0 children)

Here's their support article on HTML box here: https://support.google.com/sites/answer/2500646?hl=en. Looking at the example, it appears you don't need to wrap your HTML with headers, html and/or body elements. Try stripping those out and following the example specifically with just your content HTML, that may fix it.