Tried the usual fixes, clear my browser's cache, turn off SSH,HTTPS scanning in the anti-virus/firewall software, it's strange that I'm getting this message now....and only on THIS site. What gives?
Shockwave The SSL certificate for the hosting provider has expired. It this has been brought to the attention of @nadenislamarre who has brought the issue up with the hosting provider.
In the interim I've resorted to using Firefox to browse the site/forums.
same problem here
Kaspersky Internet Security SSL-Error with Chrome
again expired today.
Don't you have an automatic Let's encrypt certificate update service running?