To create the map we just pass your address details to Google Maps.
So, if you find the map isn't working, the only thing you can really do is to tweak what you put in the address field of your site to try to ensure that Google recognises it.
In this case, if you click on the map you'll see that Google can't find a place with this URL.
If modifying your address doesn't help then you could try adding your organisation to Google directly as a business listing.
Finally, if nothing helps, your best bet might be to either remove the map, or just take a screenshot of the map you want directly from Google Maps and add the image to your site.
Thanks
Joe - Voice Admin