Did you find a solution? I have the same issue. I have attempted to upload the file directly through the Adaptable Footer content section1 upload file, and I have also built a repository, uploaded the file there, and selected it from the repository in the file picker. Neither worked. Image here: https://imgur.com/a/Gp7UU54. The text which says "Good Science in Plain Language" and the 1-800-number should be a graphic.