Mandatory information about my setup:

Have I searched the tickets before posting? Yes
Have I searched the forum before posting? Yes
Have I read the documentation before posting (which pages?)? Yes
Joomla! version: (unknown)
PHP version: (unknown)
MySQL version: (unknown)
Hotspots version: Last
Direct link to the page that shows the issue: http://www.borghisvizzera.ch/index.php/ticino-it/rasa-it


Description of my issue:
Hello,
I have a problem... the map is not shown inside the article, I just see the border. Why?