Out of date Chrome results in ERR_CERTIFICATE_TRANSPARENCY_REQUIRED
bugs.chromium.org
bugs.chromium.org
This exact issue was affecting my girlfriend's machine a few days ago. I restarted chrome to update and the problem went away. At the time, I just thought it was an overly pushy new feature by google to force people to update.
The only indication you should update Chrome is some small red dots near the right edge of the window.
Skimming the ticket comments, it smells like an idea that, ten weeks after Google's compile, a given release will start throwing SSL cert handshake alarms for at least some major websites.
Anybody that does not permit Chrome to auto-update might anticipate many intrusive SSL security warnings, every 10 weeks or less.
While you may have downloaded and installed Chrome on a given date, the download's compilation timestamp could be any point up to ten weeks in the past?
All because anti-virus?