Yes... It's because Ubuntu 22.04 LTS is now using upper version of plasticscm dependencies... PlasticSCM team needs to upgrade the dependencies. So, sorry @calbzam but again, if you used FlatPak, this kind of issue will no longer happen. Here is a proof from the official FlatPak documentation (https://docs.flatpak.org/en/latest/dependencies.html) :
So please, again, consider using FlatPak for package delivery. It will be appreciated also by Ubuntu users.
Thank you.