Trying to embed a GameSalad iframe on a Squarespace webpage

I am trying to embed a GameSalad iframe on my Squarespace webpage. When I embed the code the GameSalad iframe is created and I can see it; however, when I save the editing the entire webpage turns white - I lose the iframe as well as the header and footer of the webpage. I will attach a video of the issue to this. 

The code for the GameSalad iframe: 

<iframe src='http://e.gsrca.de/169758?s=560&mode=embed' width='560' height='778' allowtransparency='true' scrolling='no' style='border:none;' mozallowfullscreen  webkitallowfullscreen allowfullscreen />

Thank you very much!

Hi,

Can you share link to page where you added the code? We can check easier

Thank you very much for the reply! Is the following what you need:

https://www.mattymacrophage.com/phageball

Thank you again!