Issue:
You get this “Bug in Mailman version 2.1.9.cp2”
Fix:
Go to /usr/local/cpanel/3rdparty/mailman
then
ls
Then
chmod -R 2775 ./*
If it fails then try scripts.
/scripts/fixmailman
/scripts/reinstallmailman
& do check mailman error logs for errors .
/usr/local/cpanel/3rdparty/mailman/logs/error
