It says clearly that the problem is the redirect uri. You get more details if you click “error details”.
If you go in your google developer console you can see the authorized redirect uri and add the one you are missing.
Go in your cloud console, the one from where you set up you credentials for the integration.
You should see your client ID, client secret and a list of redirect URIs.
Check the error details in the failed google signin, you should be able to see the mismatched url.
thanks Mariano. I think i know what the problem was, and more importantly, how to solve it if it happens again in the future.
I added one more uri and now I need to wait to see if it works. thanks again.