Google Cloud OAuth 2.0 Client ID creation fails instantly when adding authorized redirect URI

I am trying to create an OAuth 2.0 Client ID in Google Cloud for n8n (Google Sheets integration). The client ID is created successfully when no redirect URI is included, but the creation process fails instantly when I add the authorized redirect URI. This happens in a new project with Google Sheets and Drive APIs enabled, no organization restrictions, and after trying different browsers and incognito mode. The error is “Attempted action failed” with a request ID. It appears to be a Google Cloud Console issue where the OAuth client creation fails only when adding the redirect URI.