Safari can't establish a secure connection
I am using Safari 11.1
As of today, I cannot access the site of Private Internet Access (PIA VPN). Persistent error message: "Safari can't establish a secure connection". The VPN is not engaged, I didn't change any parameters in system preferences, and all else is working fine. I ran EtreCheck which showed no issues and emptied caches but to no avail. The only thing I can think of is a faulty certificate and/or Apple's latest security update installed a few days ago, but then, such updates have never caused any problems before.
Does anyone has an idea?
iMac, macOS High Sierra (10.13.3), null