Symantec certs not trusted in latest Chrome update
I don't think this is related to the certificate errors some users reported a month ago, but the latest version of Chrome (version 66) no longer trusts Symantec certificates, causing trust errors when trying to access the forums. 66 is out now for users that opted in for beta updates, and is expected to be rolled out for everyone else in about a month.
More info here:https://security.googleblog.com/2018/03/distrust-of-symantec-pki-immediate.html
edit: clarifying it's ff beta.