Bug in Mailman version 2.1.9.cp2

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.


Possible Reason of this issue : Insufficient permission for the directory /usr/local/cpanel/3rdparty/mailman
Solution : Go to /usr/local/cpanel/3rdparty/mailman and check the permission of all the folders.

ll /usr/local/cpanel/3rdparty/mailman

Then try changing the permission to chmod -R 2775 ./*

Check whether the issue has been fixed.

If not try running /scripts/fixmailman