Chrome Version: 71.0.3578.44 (Official Build) beta (64-bit)
OS: Linux

What steps will reproduce the problem?
(1) Go to google.com

What is the expected result?
The google home page

What happens instead?
I get: 

Well, well, well. What do we have here? An Origin Policy violation.

And what do we not have? A page!

You're trying to go to: https://www.google.com/
The policy applies to: https://www.google.com

This appears to be the error message added in https://chromium-review.googlesource.com/c/chromium/src/+/1204170/16/components/security_interstitials/core/browser/resources/interstitial_origin_policy.html

The only flag I have set is --enable-experimental-web-platform-features.

I upgraded to the new version of chrome today, but didn't see the problem immediately. Now it has happened, it happens every single time.