After a recent update to Chromium on Ubuntu 16, the browser now seems unable to access many sites behind HTTPS, like Amazon's AWS Console, reporting:
Your connection is not private
Attackers might be trying to steal your information from console.aws.amazon.com (for example, passwords, messages, or credit cards).
It seems unlikely that Amazon doesn't know how to create an SSL certificate or is trying to "steal my information", and sure enough, the URL works perfectly in Firefox, so my guess is this is some odd bug in Chromium. I tried reporting this error to AWS, and they explicitly said it was a bug in a recent version of Chromium/Chrome.
However, unlike Firefox, Chromium doesn't provide any option to make an exception. Until this is fixed in Chromium, how do I disable this check or exempt certain domains that I trust?