Any solution for the Google OAuth 400 and 403 errors?

Hello! I'm having some issues with the Google OAuth extension in Xano, I believe I did the whole setup the right way twice, but when I hit the /oauth/google/continue after the /oauth/google/init, I'm getting this 403 response on my application (Webflow + Wized):
{
'code': 'ERROR_CODE_ACCESS_DENIED', 'message': 'Precondition failed.',
'payload': ''
}

Then, manually did the same steps but in Xano trying to debug it, turns out the error happens in a custom function called google_oauth_getaccesstoken, from where Xano makes a request to the Google OAuth API, I ran & debugged the function with an unused code (filtered with url_decode) and the authorized redirect_uri from google cloud console as parameters, and I get this 400 response:

I've seen that there are already posts about this issue and some workarounds for it, but I already tried everything I found and I am still stuck, I hope is just a silly mistake I made through the configuration process.

Any suggestions on what could be going wrong or what should I try?
Thank you!

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