@ Brian
Sorry to hear you are having trouble with the Google Maps API. Unfortunately this is not something I can set up for you.
The key is setup, but according to the error message from Google, the site referrer restriction is not correct.
You have two options…
The first is the easiest. Do not use Google Maps. Remove the keys from the Connections Settings admin page and the maps will default to Wikimedia Maps.
The second is remove the referrer restriction from the Google Maps API key in the Google Console.
There is one last one, correct the referrer restriction on the Google Maps API key in the Google Console. Keep in mind change are not immediate and can take several minutes to be propagated through Google’s servers.
In regards to the login link, what you supplied looks to be only the temporary security key… you need to copy paste the whole link.