Could'nt load plugin

Added a link to a Shapespark that contains an iframe

… and Shapespark returns: “could’nt load plugin”.

Can someone help me understand the problem and a solution? That page that I am trying to load in an iframe is https://www.elevation3d.com/elevation3d-alternative-event-solutions-03192020 and it contains an <embed PDF

Thank you for any help.

Are you able to share a link to this scene (here or via email support@shapespark.com)?