Embedded Items Not Loading

The embed function suddenly stopped working properly a couple of days ago.
Now when a user clicks on the “Let’s Play” button, the loading wheel just spins indefinitely, but the item will not load.
You can see this behavior at the following page: https://clutterbug.me/what-clutterbug-are-you-test

I have tried both the WordPress plugin, and the embed code provided on the Playbuzz item page, and both sets of code return the same results.

The page I need help with: [log in to see the link]