I have the same problem. This is what I found out so far:
https://bugs.launchpad.net/ubuntu/+source/chromium-browser/+bug/1641380
https://bugs.chromium.org/p/chromium/issues/detail?id=664177
https://knowledge.symantec.com/support/ssl-certificates-support/index?page=content&id=ALERT2160
Are you also using Version 53.0.2785.143?
Looks like it is important when the build happened: https://chromium.googlesource.com/chromium/src/net/+/master/cert/ct_policy_enforcer.cc#44
Looks like the best workaround is to upgrade to 54.x, wait for a patch or use another browser.
Update: A new version of chromium, that fixes the problem, was just released (at least for ubuntu).