But it is:
Nah, that URL just isn't correct. You lazily only tried the first link in OP 
which is missing a part.
Unless OP is also owner of that domain and forgot to include it? Mebbe.. I dunno.
Wait... I only have "soc" instead of "society".
Doh... I even had it right here:
Maybe that was the old site?
Glad I'm not losing my mind... not that there's much left to lose. 
There's that beautiful cert:
Does CertSage already support ECDSA? So its certs can be even more beautiful? 
Not yet, but easy to do. 
I only haven't implemented yet due to compatibility concerns. Suppose it could be an option.
It is indeed a thing of beauty. Many thanks to everyone who helped me out. I could not have installed the ssl certificates without your help and the fabulous work of letsencrypt. A special shout-out also for Certsage!
Woot! 