Embed Mode not working in Snap! mod

I have a Snap! mod hosted at Starbox614 github, and I want to use it for a custom embed on my website, but when I tried to use Embed mode it did this:

Screenshot

Works for me

#run:https://starbox614.github.io/snapprojects/JStester.xml&noExitWarning&hideControls

#run:https://starbox614.github.io/snapprojects/JStester.xml&noExitWarning&embedMode

on yours and mine and the official snap version, it has the same result

Ok, I guess I needed to use #run instead of #open.
¯\_(ツ)_/¯

?