"The post you are looking for is not available" error

Hi!

I embedded a Storyline course in an iframe in a post following the instructions in your how-to video. When I open the post I get a page that says it cannot find the post. Do you know why this could be happening?

Here’s a link:

http://pathwaylaw.com/wp-admin/post.php?post=1276&action=edit

https://wordpress.org/plugins/insert-or-embed-articulate-content-into-wordpress/