Hi. Software migrations rarely go off without a glitch or two (dozen).
I did the basic diligence with 20 minutes sniffing around the various points of 0ad's migration path, looking for a signal that folks were on this issue, but my sense is it might not be on radar right now.
I'm running Kubuntu 24.04 just now, and installing the game, as posted instructions instruct, isn't working at basic user levels. First, synaptic is only showing two data packages, and installing either or both does not install a working game. Going the terminal route, with: 'sudo apt install 0ad' results in the error message given in the title. Let me know if I can assist in resolving this minor ( I CAN'T PLAY MY F###ING GAME!) issue.