[Mailman-Users] How to deal with mailman-2.1.4 NotAMemberError ?

[Chen Fei]

I installed mailman-2.1.4. But when the Mailman verify if the user email is valid,the following bug occur.
How can I solve it?
 

 Bug in Mailman version 2.1.4
 We're sorry, we hit a bug!

 If you would like to help us identify the problem, please email a copy of this page to the webmaster for this site with a description of what happened. Thanks! 

Traceback:
 Traceback (most recent call last):
  File "/usr/local/mailman/scripts/driver", line 87, in run_main
    main()
   File "/usr/local/mailman/Mailman/Cgi/roster.py", line 85, in main
     password, addr)
   File "/usr/local/mailman/Mailman/SecurityManager.py", line 220, in WebAuthenticate
     ok = self.CheckCookie(ac, user)
   File "/usr/local/mailman/Mailman/SecurityManager.py", line 300, in CheckCookie
     ok = self.__checkone(c, authcontext, user)
   File "/usr/local/mailman/Mailman/SecurityManager.py", line 310, in __checkone
     key, secret = self.AuthContextInfo(authcontext, user)
   File "/usr/local/mailman/Mailman/SecurityManager.py", line 105, in AuthContextInfo
     secret = self.getMemberPassword(user)
   File "/usr/local/mailman/Mailman/OldStyleMemberships.py", line 102, in getMemberPassword
     raise Errors.NotAMemberError, member
 NotAMemberError: xxx at xxx.com