Related bug:
https://bugs.launchpad.net/ubuntu/+source/unison/+bug/1971036 "Unison incompatible between ubuntu 20.04 and 22.04"
Related bug:
https:/ /bugs.launchpad .net/ubuntu/ +source/ unison/ +bug/1971036
"Unison incompatible between ubuntu 20.04 and 22.04"