This is not a bug . Any Word preess Location plugin that uses google MAPS now requires a Google MAPS Javascript APi key and billing account.
See news feeds here
see documentation here.
The options are to obtain your own google MAPS Javascript API key and add your own credit card billing info to establish an account with google platform, or use MYSLP , a subscription based software as a service and let the MYSLP team worry about the API keys. There is also a load/transfer locations from your WPSLP base plugin into MYSLP.