For about a week I couldn't access the site with any browser, I kept getting a message that there was a security issue. Did we have a recent update? Things seem okay now...

I've been on every day this week without issue. Not sure what to tell you.

I couldn't get on either until yesterday.

Super weird. Did either of you clear cookies or use Incognito Mode or your browser's equivalent and still fail to connect? I'm asking because I can't tell if this was a browser issue, a network issue, or something more exotic.

I gave been getting that message for a long time. This site is insecure by modern security standards (think banking passwords etc.) but there's no actual risk. You can change the settings in your browser to block, ask, or allow views and logins to "insecure" sites.

I tried Firefox, Brave and Chrome, none would connect. I didn't dig deep into the settings though. But now things seem back to normal.

I didn't do any of those things, but I did try to get on using two different browsers - Firefox and Edge.