Chromium (!) Version       : Version 53.0.2785.143 Built on Ubuntu , running on Ubuntu 16.10 (64-bit)
URLs (if applicable) : https://get4x.com/
Other browsers tested: Firefox (OK), Safari (OK), Chrome (OK)

What steps will reproduce the problem?
(1) access get4x.com on Chromium (NOT Chrome)
(2) you get warning: Your connection is not private (NET::ERR_CERTIFICATE_TRANSPARENCY_REQUIRED)

What is the expected result?

No error message like on other browsers.

What happens instead?

Cannot access website.
Please provide any additional information below. Attach a screenshot if
possible.