OK - it's fixed. But in doing so, that broke all of the maps where people had changed things manually back to http instead of https.
Now you can once again just copy the text right from that box and put it between the gmap tags and it will work. The reason this broke is that the code specifically looks for
http://maps.google.com to be present in the link. If it's not there, it intentionally fails. I updated that code to look instead for the https version.