This is on behalf of an old client. Does the YJGM plugin still work? I checked on your plugin page and it shows a greyed out map with 'for development only' on it. Same story on the client site.
Can this be fixed somehow (using openlayers or something else?).
Are you sure your are posting in product assigned forum?
What is your CMS version?
: Joomla 3.x
Link to installation
Have you edited any files? If yes tell us which ones.
Is this personal or client website?