What does the error message "Request failed with status code 403, Expected one of HTTPStatus.OK: 200" mean when uploading a file using Python?

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The error message means that the server understood the request that was made, but it is refusing to fulfill it because the client does not have the necessary permissions. Specifically, the error code 403 means "Forbidden", and the message is indicating that the server is expecting a successful response with a status code of 200 (which means "OK"), but instead it got the Forbidden error.