mailman: can't run adminstration for group

[Brian May <bam@debian.org>]

Hello,

This bug (#83217) seems to be driving me up the wall. I am using
mailman from stable.

Whenever I get an administration request (via E-Mail), I click on the
link, and get an "Internal Server Error".

If I play around with certain things longs enough (eg. delete the lock
files + X), it suddenly comes good. I have no idea what to do though
to fix the problem, as nothing I try seems to work.

Any ideas?

Thanks in advance.
-- 
Brian May <bam@debian.org>