阿里云OpenAPI 我这个报错:也是因为没配置公网么？

阿里云OpenAPI 我这个报错: Failed to establish a new connection: [Errno 8] nodename nor servname provided, or not known',)) 也是因为没配置公网么？ 我是用sdk默认的，指定region，有相关文档么？

[2024-07-19 15:12:13,595 ERROR/438@client.py] HttpError occurred. Host:ecs.cn-wulanchabu-test-4.aliyuncs.com SDK-Version:2.13.35 ClientException:SDK.HttpError HTTPConnectionPool(host='ecs.cn-wulanchabu-test-4.aliyuncs.com', port=80): Max retries exceeded with url: /?PageSize=100&PageNumber=1&Version=2014-05-26&Action=DescribeInstances&Format=JSON&RegionId=cn-wulanchabu-test-4&Timestamp=2024-07-19T07%3A12%3A13Z&SignatureMethod=HMAC-SHA1&SignatureType=&SignatureVersion=1.0&SignatureNonce=4e118c7f-e74f-53cb-9dc6-780fd53d8a98&AccessKeyId=LTAI5t8KH5QHu3zcpDxHoh6J&Signature=V66pRcufd8qqmlmwPcMgUISLTE0%3D (Caused by NewConnectionError(': Failed to establish a new connection: [Errno 8] nodename nor servname provided, or not known',))