Hi Theodor,
Thanks for reaching out. Please note that you cannot make API calls against a cancelled account. If you are making an API call against a canceled account, the API request will fail with CUSTOMER_NOT_ENABLED error. Could you please send the complete request and response logs for me to further investigate? Please reply privately to the author option.
Let me know if you have any questions.
Thanks,
Nirmita Patel google Ads Team