status works fine for me with the new snapshot. Thanks for the quick fix!
With the above snapshot, backup works without the "no valid command" warning. status throws an error, though: # duply mail status Start duply v2.5.0dev, time is 2023-09-22 08:12:29. Using profile '/etc/duply/mail'. Using installed duplicity version 2.1.1, python 3.9.2 (/opt/ddtbackup-py3/venv3/bin/python3) 'PYTHONPATH=:/usr/lib/python39.zip:/usr/lib/python3.9:/usr/lib/python3.9/lib-dynload:/opt/ddtbackup-py3/venv3/lib/python3.9/site-packages:/usr/local/lib/python3.9/dist-packages:/usr/lib/python3/dist-packages',...