I don’t see an embed on that page you have linked so I’m not able to help you. Judging by your link the it’s being served over HTTP, where as embeds now required SSL so you MUST serve your site over HTTPS if you wish to use an embed.
Also as a side note, in case you’re unaware, your site breaks when using a script blocking browser extension. Rather than fail safely and just display an error, your site continues to use a lot of CPU resources to try and load the page but constantly fail if scripts are not enabled.