Chrome Mac - NET::ERR_CERT_AUTHORITY_INVALID

About This Mac:OS X Yosemite 10.10.2 & MacBook Pro (Retina, 15-inch, Early 2013).

While trying to access GitHub · Build software better, together. (using Goolge Chrome Version 41.0.2272.43 beta (64-bit)), I'm getting following error:

NET::ERR_CERT_AUTHORITY_INVALID

I'm able to access same site using Safari and/or Firefox.

Any ideas?