I answered a similar question here:
- https://stackoverflow.com/questions/79636367/cant-configure-a-consent-screen-clicking-on-oauth-consent-screen-redirects-m
In short, many believe it's an issue with rolling out the new UI, and some were able to fix it through a combination of
1. using a different browser/private/incognito)
1. Deleting and re-creating the project
1. Use a login link that redirects to the oauth consent screen
1. If the app is for external audience, set yourself as a test user
None of these actually worked for me though (my app is internal), but worth a try - I recommend subscribing to the below in case a fix is reported:
1. https://www.googlecloudcommunity.com/gc/Community-Hub/Problem-with-Oauth-consent-screen/m-p/913303
1. https://www.googlecloudcommunity.com/gc/Google-Cloud-s-Observability/Cannot-access-OAuth-Consent-Screen-setup-keeps-redirecting-to/td-p/908771
1. https://www.reddit.com/r/googlecloud/comments/1l3zi9q/help_google_cloud_console_redirects_me_from_oauth/
1. https://www.reddit.com/r/devops/comments/1isamvc/cant_configure_a_consent_screen_clicking_on_oauth/
1. https://community.home-assistant.io/t/google-drive-oauth-consent-screen/842720
This redirect loop issue has been reported in multiple places.
The issue (from what I've read) appears to be with the introduction of the new UI for the OAuth Consent Screen.
Some people reported to have gained access to this page by using one (or more) of the following:
1. Different browser (or private/incognito)
1. Deleting and re-creating the project
1. Use a login link that redirects to the oauth consent screen
1. If the app is for external audience, set yourself as a test user
If none of the above worked for you (it didn't for me), I recommend subscribing to the posts below in case any updates arise:
1. https://stackoverflow.com/questions/79653627/clicking-oauth-consent-screen-in-google-cloud-console-redirects-to-overview-page
1. https://www.googlecloudcommunity.com/gc/Community-Hub/Problem-with-Oauth-consent-screen/m-p/913303
1. https://www.googlecloudcommunity.com/gc/Google-Cloud-s-Observability/Cannot-access-OAuth-Consent-Screen-setup-keeps-redirecting-to/td-p/908771
1. https://www.reddit.com/r/googlecloud/comments/1l3zi9q/help_google_cloud_console_redirects_me_from_oauth/
1. https://www.reddit.com/r/devops/comments/1isamvc/cant_configure_a_consent_screen_clicking_on_oauth/
1. https://community.home-assistant.io/t/google-drive-oauth-consent-screen/842720
