As described in https://docs.mailman3.org/en/latest/upgrade-guide.html#post-upgrade I ran the following commands and the problem seems to be fixed:
$ sudo systemctl stop mailman3 $ sudo systemctl stop mailman3-web $ sudo mailman-web migrate $ sudo mailman-web compress $ sudo mailman-web collectstatic $ sudo systemctl start mailman3 $ sudo systemctl start mailman3-web I suggest including these steps in the documentation. By the way, I could not run $ sudo mailman-web compilemessages which resulted in error: CommandError: This script should be run from the Django Git checkout or your project or app tree, or with the settings module specified. I don't know why, but the program is running fine without this step. -- MIZUHARA Bun <mizuh...@acm.org>
