Hmm, interesting... I believe this is a problem on Google's end.
After much head-scratching over the (seemingly-straightforward) error message Google's returning, I directly copied the sample Google Maps HTML provided by Google here
, entered a fresh API key, and saved it at http://castdemo.centova.com/test.html
. As you can see, it generates the same error message you're seeing on the demo start page.
Given that Google's own sample code doesn't work, I'm guessing someone at Google's been tinkering with something they shouldn't have.
Hopefully it gets fixed soon.