After an upgrade of Debian and a reboot, Mailman stopped working. At the command line I tried to start Mailman and I get the following error:
# systemctl restart mailman Job for mailman.service failed because the control process exited with error code. See "systemctl status mailman.service" and "journalctl -xe" for details. root@zarathustra:~# systemctl status mailman.service ● mailman.service - GNU Mailing List Manager Loaded: loaded (/lib/systemd/system/mailman.service; enabled; vendor preset: enabled) Active: failed (Result: exit-code) since Wed 2023-03-08 20:17:45 UTC; 8s ago Process: 31893 ExecStart=/opt/mailman/mm/bin/mailman start (code=exited, status=1/FAILURE)
Mar 08 20:17:45 zarathustra.ccalternatives.org mailman[31893]: from ._collections import coerce_generator_arg as coerce_generator_arg Mar 08 20:17:45 zarathustra.ccalternatives.org mailman[31893]: File "/opt/mailman/mm/venv/lib/python3.7/site-packages/sqlalchemy/util/_collectio ns.py", line 39, in <module> Mar 08 20:17:45 zarathustra.ccalternatives.org mailman[31893]: from .typing import Literal Mar 08 20:17:45 zarathustra.ccalternatives.org mailman[31893]: File "/opt/mailman/mm/venv/lib/python3.7/site-packages/sqlalchemy/util/typing.py" , line 36, in <module> Mar 08 20:17:45 zarathustra.ccalternatives.org mailman[31893]: from typing_extensions import Concatenate as Concatenate # 3.10 Mar 08 20:17:45 zarathustra.ccalternatives.org mailman[31893]: zope.configuration.xmlconfig.ZopeXMLConfigurationError: File "<string>", line 7.2-11.6 Mar 08 20:17:45 zarathustra.ccalternatives.org mailman[31893]: ImportError: cannot import name 'Concatenate' from 'typing_extensions' (/opt/mailman/mm/venv/lib/python3.7/site-packages/t Mar 08 20:17:45 zarathustra.ccalternatives.org systemd[1]: mailman.service: Control process exited, code=exited, status=1/FAILURE Mar 08 20:17:45 zarathustra.ccalternatives.org systemd[1]: mailman.service: Failed with result 'exit-code'. Mar 08 20:17:45 zarathustra.ccalternatives.org systemd[1]: Failed to start GNU Mailing List Manager. lines 1-15/15 (END)
Please advise. Thank you.
Oh and I am running Debian GNU/Linux 10 (buster)