Someone has done an incomplete job of backporting the from_is_list
feature from Mailman 2.1.16+ into your 2.1.9 Mailman installation.
The /usr/lib/mailman/Mailman/Gui/General.py file at least has been
modified to include the option, but either the changes to
/usr/lib/mailman/Mailman/versions.py to add the attribute to existing
lists and/or changes to /usr/lib/mailman/Mailman/MailList.py to add the
attribute to new lists have not been made or the DATA_FILE_VERSION
setting in /usr/lib/mailman/Mailman/Version.py has not been incremented.
** Changed in: mailman
Status: New => Invalid
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https://bugs.launchpad.net/bugs/1434788
Title:
How to fix Mailman Bug when Admin Login?
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