I'd exactly the same challenge on Windows 10. It transpires to be because of the aws cli not looking at the web proxy placing within the Home windows registry. Set identical error by placing the surroundings variables HTTP_PROXY and HTTPS_PROXY to the company Net proxy. Hope it can help someone! https://iam99764296.total-blog.com/the-smart-trick-of-iam997-that-no-one-is-discussing-54483523