3D Tour embed code broken

Site URL: https://www.hrhdevelopment.com/eco-friendly-modern-home-new-york

Hi I have these custom 3D Tours like you can see here: http://3drenderings.scan2plan.io/shapespark/sanctuary_series_1_ciana/index.html

Until recently I was able to embed these into a video block - it was responsive and resizable by using the embed code on the video block. Now for some reason I get a frowny face Icon instead of the player. 

Here's an example of the embed code that was working until recently:
<iframe src="https://3dtour.home3ds.com/holly_blue/index.html"    style="border:0px #ffffff none;" name="myiFrame" scrolling="yes"    frameborder="1" marginheight="0px" marginwidth="0px" height="800px" width="1200px"    allowfullscreen> </iframe>

here's an example of a page where this block is broken: https://www.hudsonrealitycapture.com/spaces/2020/1/10/hudson-river (middle of page)

I've tried a video block a code block and an embed block - nothing works. Squarespace support was unable to help me. Any ideas??