Internal Server Error http 500 after upgrade of ireadmin 0.2.2 -> 0.3

==== Required information ====
- iRedMail version: 0.8.5
- Store mail accounts in which backend (LDAP/MySQL/PGSQL): mysql
- Linux/BSD distribution name and version: CentOS release 6.5 (Final)
- Related log if you're reporting an issue: /var/log/httpd/ssl_error_log
====
Hello,
I've followed instruction http://www.iredmail.org/wiki/index.php? … ce.Edition
But after an upgrade I get an error HTTP 500 only in iredadmin:
Here's output from /var/log/httpd/ssl_error_log
[Wed Jan 15 23:23:42 2014] [error] [client 10.10.30.154] mod_wsgi (pid=1537): Target WSGI script '/var/www/iredadmin/iredadmin.py' cannot be loaded as Python module.
[Wed Jan 15 23:23:42 2014] [error] [client 10.10.30.154] mod_wsgi (pid=1537): Exception occurred processing WSGI script '/var/www/iredadmin/iredadmin.py'.
[Wed Jan 15 23:23:42 2014] [error] [client 10.10.30.154] Traceback (most recent call last):
[Wed Jan 15 23:23:42 2014] [error] [client 10.10.30.154]   File "/var/www/iredadmin/iredadmin.py", line 9, in <module>
[Wed Jan 15 23:23:42 2014] [error] [client 10.10.30.154]     from libs import iredbase
[Wed Jan 15 23:23:42 2014] [error] [client 10.10.30.154]   File "/var/www/iredadmin/libs/iredbase.py", line 18, in <module>
[Wed Jan 15 23:23:42 2014] [error] [client 10.10.30.154]     import iredutils
[Wed Jan 15 23:23:42 2014] [error] [client 10.10.30.154]   File "/var/www/iredadmin/libs/iredutils.py", line 254, in <module>
[Wed Jan 15 23:23:42 2014] [error] [client 10.10.30.154]     min_passwd_length=settings.min_passwd_length,
[Wed Jan 15 23:23:42 2014] [error] [client 10.10.30.154] AttributeError: 'module' object has no attribute 'min_passwd_length'