Hello,

I have setup an Authentication Provider and Named Credential to authenticate to Google (specifically Google Calendar), this has worked fine in Sandbox for the past 2 weeks (and is still authenticated as I write this, using a free Gmail account). The problem came when I needed to replicate this in production, where I'm using the same settings though adjusted with the production domain url for the callback. Now the Named Credential fails to authenticate. The error I get is Remote_Error: invalid_request

If I edit the Sandbox Named Credential which is currently authenticated and click save to start the auth flow again, then I get the same error in the Sandbox environment, however that one stays authenticated even after that (same if I use the Test-Only Initialization URL inside Auth.Provider)

I have also tried using a different Gmail account with a new project in the google console, different client secret and id, but I got the same error.

My authentication provider is using Open ID Connect as Provider Type. I have also tried using Google as provider type however I get a different error: Id_Token_Error: Missing id_token






Any help would be kindly appreciated.
Thanks,
Cosmin