Hi Rob,
as far as I remember the latest ubuntu version that was compatible with QAtrack was 22.04. LTS. At least that is what I am running. There was/is a branch from QATrack+ called
python3.10 that changed I think only one package in the requirements to make QATrack work with python3.10.
As you might have read here in the list Cody is preparing a new release that is compatible with python3.12 which is almost finished it seems. It might be the best idea to wait some more and move directly to QATrack 4.
The main problem with older python version in ubuntu is that you have to compile
mod-wsgi for the python version in use which is probably quite time consuming.
regards
Thomas