On
http://openhatch.org/ ,
when I enter my email and hit the "Subscribe" button, I am getting
Bug in Mailman version 2.1.15
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.
On http://openhatch.org/ , when I enter my email and hit the "Subscribe" button, I am getting