REQUEST_DENIED error when trying to find any address.

I am using GMapFP through Joomla. I'm trying to add new locations to a map for my website that I have not updated in a few years. When I try to click "Find" using the find this address search I get an error that looks like "1234 Main St., Town, CA 12345, not found for the following reason: REQUEST_DENIED" no matter what address I enter. I would have to add hundreds of geographical coordinates that I find through Google Maps which I am hoping to avoid, how do I fix this?