Gmail - Cookie auth issue with Calendar invitation top details missing / Autocomplete /etc..

[kamyweb]

OS: Ubuntu 21.10
Versione: 5.7.0

also reported here with some screenshots https://github.com/meetfranz/franz/issues/2083#issue-1015933386

If I debug correctly all calls to https://*.clients6.google.com reply with 401 http error code and body:

{
  "error": {
    "code": 401,
    "message": "Request had invalid authentication credentials. Expected OAuth 2 access token, login cookie or other valid authentication credential. See https://developers.google.com/identity/sign-in/web/devconsole-project.",
    "errors": [
      {
        "message": "Invalid Credentials",
        "domain": "global",
        "reason": "authError",
        "location": "Authorization",
        "locationType": "header"
      }
    ],
    "status": "UNAUTHENTICATED"
  }
}

the call to download calendar that is wrong may be this:
https://clients6.google.com/gmail/v1fpa_gmail_frontend_gwt/users/me/threads/batchListCalendarEvents?alt=protojson&key=xxxxxxxxxxxxxxxx

Also this "endpoints" report the same auth issue:

userlookup
drive
autocomplete

[kamyweb]

after some search I found all that calls miss this header:

origin: https://mail.google.com

If I add this header to the wrapper curl call, server reply correctly!