Hi Lukas,
Could you confirm if you indeed have an existing cloud project? If not, I recommend that you create one (see
create project) so you may then create a new set of credentials that you can use for authenticating your API requests.
Also, when you tried regenerating your
OAuth2 credentials and then the
refresh token, could you confirm if you were logged in as the same Google Ads user (email address)? I asked because these credentials should be generated as the same user in order to avoid various authentication issues.
If the issue persists, could you provide the complete
request and
response logs, with the
request-id, along with the user / email address you used when generating these authentication credentials?
For the requested details, you may send them over to our team via the
Reply privately to author option. If this option is not available, you may send the details directly to our
googleadsa...@google.com alias instead.
Best regards,