i see the same thing here, but Internet Explorer generally works - at least with the default OSM map layer.
Looking at your site with Developer Tools enabled (F12 in IE/Firefox/Chrome),
Internet Explorer complains about some misformatted HTML in the photo that follows the map and some text. Maybe that is the cause?
Can you try to remove the photo from the article and check if it works then?
I have the plugin working fine. Firefox shows the maps like it should, I think.
An example is here
However, Internet Explorer users report they don't see the map. They see the track on a light red background.
Is there a problem with Internet Explorer not showing the map?