sabnzbd not working after update to 1.2.0

I did a routine update of ports today. Among others, sabnzbd+ was upgraded from version 1.1.0 to 1.2.0. The build completed without error. However, the service does not start and the following is found in the sabnzbd error log:

Traceback (most recent call last):
  File "/usr/local/bin/", line 1791, in <module>
  File "/usr/local/bin/", line 1338, in main
    hosts = all_localhosts()
  File "/usr/local/bin/", line 499, in all_localhosts
    if item not in ips and ('::1' not in item or sabnzbd.cfg.ipv6_hosting()):
TypeError: argument of type 'int' is not iterable

Uninstalling and rebuilding from the ports collection completes without error messages, but after starting the service, again the same error message. System is 10.3-STABLE (r307003), amd64. I found the IPv6 reference odd, which is not in use here and disabled on the server.

Any help would be greatly appreciated.