[Mailman-Users] Unable to access Mailman Web interface

[Steve Matzura]

If I browse to http://{my-node.my-domain.com}/mailman/admin, I get the
following:

Bug in Mailman version 2.1.18-1

Bug in Mailman version 2.1.18-1
We're sorry, we hit a bug!

Please inform the webmaster for this site of this problem. Printing of
traceback and other system information has been explicitly inhibited,
but the webmaster
can find this information in the Mailman error logs. 

If that's supposed to be /var/log/mailman/error, the only thing in
there is what I posted in my previous message. Maybe the two are
related?