Comment 5 for bug 2008430

@amberella-777 that is probably because you do not have any python packages whose version pkg_resources considers "invalid". In my case, it currently stumbles on `syncthing` package (from a third party repo)

Apr 11 20:01:01 pccross org.debian.apt[6869]: 20:01:01 AptDaemon [INFO]: Initializing daemon
Apr 11 20:01:01 pccross org.debian.apt[6869]: /usr/lib/python3/dist-packages/aptdaemon/worker/pkworker.py:35: PyGIWarning: PackageKitGlib was imported without specifying a version first. Use gi.require_version('PackageKitGlib', '1.0') before import to ensure that the right version gets loaded.
Apr 11 20:01:01 pccross org.debian.apt[6869]: from gi.repository import PackageKitGlib as pk
Apr 11 20:01:01 pccross org.debian.apt[6869]: Traceback (most recent call last):
Apr 11 20:01:01 pccross org.debian.apt[6869]: File "/usr/lib/python3/dist-packages/aptdaemon/core.py", line 1462, in __init__
Apr 11 20:01:01 pccross org.debian.apt[6869]: from .worker.pkworker import AptPackageKitWorker
Apr 11 20:01:01 pccross org.debian.apt[6869]: File "/usr/lib/python3/dist-packages/aptdaemon/worker/pkworker.py", line 43, in <module>
Apr 11 20:01:01 pccross org.debian.apt[6869]: from ..pkutils import (bitfield_add, bitfield_remove, bitfield_summarize,
Apr 11 20:01:01 pccross org.debian.apt[6869]: ModuleNotFoundError: No module named 'aptdaemon.pkutils'
Apr 11 20:01:01 pccross org.debian.apt[6869]: During handling of the above exception, another exception occurred:
Apr 11 20:01:01 pccross org.debian.apt[6869]: Traceback (most recent call last):
Apr 11 20:01:01 pccross org.debian.apt[6869]: File "/usr/sbin/aptd", line 39, in <module>
Apr 11 20:01:01 pccross org.debian.apt[6869]: aptdaemon.core.main()
Apr 11 20:01:01 pccross org.debian.apt[6869]: File "/usr/lib/python3/dist-packages/aptdaemon/core.py", line 2193, in main
Apr 11 20:01:01 pccross org.debian.apt[6869]: daemon = AptDaemon(options, bus=bus)
Apr 11 20:01:01 pccross org.debian.apt[6869]: ^^^^^^^^^^^^^^^^^^^^^^^^^^^
Apr 11 20:01:01 pccross org.debian.apt[6869]: File "/usr/lib/python3/dist-packages/aptdaemon/core.py", line 1466, in __init__
Apr 11 20:01:01 pccross org.debian.apt[6869]: self.worker = AptWorker(options.chroot, load_plugins)
Apr 11 20:01:01 pccross org.debian.apt[6869]: ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Apr 11 20:01:01 pccross org.debian.apt[6869]: File "/usr/lib/python3/dist-packages/aptdaemon/worker/aptworker.py", line 205, in __init__
Apr 11 20:01:01 pccross org.debian.apt[6869]: self._load_plugins(["modify_cache_after", "modify_cache_before",
Apr 11 20:01:01 pccross org.debian.apt[6869]: File "/usr/lib/python3/dist-packages/aptdaemon/worker/__init__.py", line 191, in _load_plugins
Apr 11 20:01:01 pccross org.debian.apt[6869]: dists, errors = pkg_resources.working_set.find_plugins(env)
Apr 11 20:01:01 pccross org.debian.apt[6869]: ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Apr 11 20:01:01 pccross org.debian.apt[6869]: File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 907, in find_plugins
Apr 11 20:01:01 pccross org.debian.apt[6869]: env = Environment(self.entries)
Apr 11 20:01:01 pccross org.debian.apt[6869]: ^^^^^^^^^^^^^^^^^^^^^^^^^
Apr 11 20:01:01 pccross org.debian.apt[6869]: File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 1044, in __init__
Apr 11 20:01:01 pccross org.debian.apt[6869]: self.scan(search_path)
Apr 11 20:01:01 pccross org.debian.apt[6869]: File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 1077, in scan
Apr 11 20:01:01 pccross org.debian.apt[6869]: self.add(dist)
Apr 11 20:01:01 pccross org.debian.apt[6869]: File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 1096, in add
Apr 11 20:01:01 pccross org.debian.apt[6869]: dists.sort(key=operator.attrgetter('hashcmp'), reverse=True)
Apr 11 20:01:01 pccross org.debian.apt[6869]: File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 2631, in hashcmp
Apr 11 20:01:01 pccross org.debian.apt[6869]: self.parsed_version,
Apr 11 20:01:01 pccross org.debian.apt[6869]: ^^^^^^^^^^^^^^^^^^^
Apr 11 20:01:01 pccross org.debian.apt[6869]: File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 2679, in parsed_version
Apr 11 20:01:01 pccross org.debian.apt[6869]: self._parsed_version = parse_version(self.version)
Apr 11 20:01:01 pccross org.debian.apt[6869]: ^^^^^^^^^^^^^^^^^^^^^^^^^^^
Apr 11 20:01:01 pccross org.debian.apt[6869]: File "/usr/lib/python3/dist-packages/pkg_resources/_vendor/packaging/version.py", line 266, in __init__
Apr 11 20:01:01 pccross org.debian.apt[6869]: raise InvalidVersion(f"Invalid version: '{version}'")
Apr 11 20:01:01 pccross org.debian.apt[6869]: pkg_resources.extern.packaging.version.InvalidVersion: Invalid version: 'v0.9.4.4-ds-git20221205-12a9702d29ab'
Apr 11 20:01:01 pccross org.debian.apt[6869]: (package: syncthing-gtk)

In my view, it is unrealistic to expect that _all_ python packages installed on a system from different sources will become pep-404 compliant in the near future. And it takes just _one_ non-compliant python package, that may not even come from an apt repo, to break aptdaemon.