Got ConnectionError frequently

Cloud you help me check this issue. Thanks. I Got the blow error frequently.:
ConnectionError: HTTPSConnectionPool(host=‘’, port=443): Max retries exceeded with url: /parse/image (Caused by NewConnectionError(’<urllib3.connection.VerifiedHTTPSConnection object at 0x0567F4F0>: Failed to establish a new connection: [Errno 10060] ',))

What is the root cause ? My calls should be less than 500 per day. Is there other rate limitation?

I tested the issue here, but can not recreate it. It is certainly not an error that we send on purpose. =>If you test the connection with Postman, do you get the same result?

You probably know it, but just in case: Postman is a free Chrome app, see

If you see the problem even with Postman, a screenshot of the result could be helpful.