Same here. Started today for me, I looked up the error code "NET::ERR_CERT_AUTHORITY_INVALID" and pretty much got the same that Jim Richardson reports, it just did not say who needed to fix. I was just going to wait it out, just came back to try to finish out some work, it is 11pm pst for me and it is still bouncing to error screen. Tommorow is a new day ....