Google Docs, Sheet, Slide, Task, ... Oauth2 error 401 during validation

after clicking on Sign in with Google I receive an error 401

same error if I try with Google Sheet, but it work with Google Drive

Hi @JOduMonT, I’m sorry to hear you’re having trouble. This sounds like your OAuth credentials could be wrong. Is there a chance you have copied the wrong Client ID? When checking my own credentials I noticed the Client ID starts with a number rather than GOCS like in your screenshot:

Could you try running through the steps described in our docs and confirm if the issue still persists afterwards?