Hey @Victor_DS, I tested this functionality with no issue using both cURL and an api client, then took a closer look at the info shared info shared. From now, I would suggest some additional testing using our examples here, as well as with multiple supported versions to confirm if the issue persists across each. Eg. 2021-07 and 2021-10.
If you continue to get the same error, please feel free to share any x-request-id headers returned back with me here, and I would be happy to pass on insights moving forward - Cheers!