Fill in the article (a/an or the) where it is necessary

Что-то пошло не так. Ошибка: "Error code: 400 - {'error': {'message': "You uploaded an unsupported image. Please make sure your image is below 20 MB in size and is of one the following formats: ['png', 'jpeg', 'gif', 'webp'].", 'type': 'invalid_request_error', 'param': None, 'code': 'sanitizer_server_error'}}"