I think you’re right on that w/ the iFrame. I followed the instructions from the Admin>Custom>Embedding page. Attempted to alter & update it in every possible way I could think of.
iFrame is likely the root of the problem since it’s a javascript. I did notice that link you last sent has a section called “Custom Element” below the HTML & Embed a Site. Which I believe that’s probably what’s holding it up.
Thank you so much for all your help Lilly!