Insert a location in widget

Hi to all.

I try to use Comprehensive Google Map Plugin in a widget in WP3.6 but, I can’t add a location.
All the board is ok but, when I click on the “Add” button, nothing happen!
And, if I validate in this state, I’ve got an error message in my page.

Could you help me?

Thanks.

https://www.ads-software.com/plugins/comprehensive-google-map-plugin/