Huh, so for some reason *one* of my computers is saying it can't connect to Talking Time right now, although two other computers in the same room are having no problem. On the problem one, a rather old version of Safari just says it can't open the page because it can't establish a secure connection. On the same machine, a theoretically up-to-date version of Chrome (which may still be kinda old because it's "up to date" for MacOS 10.9) is also complaining about the secure connection and reports NET::ERR_CERT_DATE_INVALID, and when prompted for details it reports that the site's certificate expires on Jan 26, 2022. One may note that this date is in the future, albeit not by a lot. The laptop in question does admit the current date is in fact January 14. So I'm not sure why it's complaining about this when other computers/browsers aren't. Though it does look like our certificate needs updating in less than a couple weeks.
Update: looks like said laptop is throwing the same errors for some other websites with certificates expiring later in the year (including gamefaqs for example), so it's not anything to do with our certificate specifically. I probably just need to ruthlessly clear some caches or something. So, hopefully we're just on top of getting ours renewed soon. TIA to the TT support crew!