CLI

Update AWS CLI

Could not connect to the endpoint URL: “https://s3.us-east-1a.amazonaws.com/”

You probably have something wrong in your default profile for the default region.

Check your file at ~/.aws/config, you have something like

Fix the region to region=us-east-1 or whichever the region you’re defaulting to, and it will work

Reference

Frédéric Henri via StackOverflow