As part of my ongoing series ensuring the internet is the source of all answers, if you want to get SSL working for Psi on Ubuntu (or, indeed, Kubuntu), you need to install the qca-tls package. I found the answer fairly easily, but the hint was in Polish.
(Man of many talents, etc.)

Hey, thank you !!!
OMG, reading in Polish must be very dificult !
Hey thanks, man. I was just having this problem and it wasn’t looking like i would find a quick answer. Thanks alot!
Thanks to you I found it in 0.3 seconds. You rock.
In Hardy you will need libqca2-plugin-ossl