Autocomplete Field Not Working

We are having an issue with our Autocomplete Plugin not working properly.

About a month ago we had an issue with our Google API Key and that’s been validated, paid and taken care of. Before it gave us an error message “Ooops, an error has occurred.”
So I deactivated and deleted the plugin, reinstalled and now it’s giving us nothing.
The form submits properly but the address field does not autocomplete.

I have set up a test page here: https://www.investushomebuyers.com/test-page/

It’s the last field on the page before the submit button at the bottom.

Our client is needing this to work in a way where you go to investushomebuyers.com
and type in your address in the field, then when the multistep form is populated the address remains the same. Does this functionality exist or is this something we would need to get a quote on for custom development?

Thanks for your help.

The page I need help with: [log in to see the link]