Comment 11 for bug 1641380

Same error for me as well.
The Symantec Class 3 Secure Server CA - G4 is not in the chrome certificate store.

As a temporary fix, I just saved the cert to disc and imported it into chrome. You can get it here:
https://knowledge.symantec.com/kb/index?page=content&actp=CROSSLINK&id=INFO2045
Advanced Settings -> Https/SSL "Manage certificates"

I just hope Symantec hasn't been compromised or something...

Version 53.0.2785.143 Built on Ubuntu , running on LinuxMint 17.3 (64-bit)