Can't add groups to Data Synchronizer

Whenever I attempt to add a group under "Manage Access", I receive an error message that just says "Failure".

In /var/log/datasync/syncengine/engine.log, I see this:

2013-02-21 16:08:39.070 ERROR [CP WSGIServer Thread-27] [util:253] [userID:] [eventID:] [objectID:] [] EXCEPTION: ********************
2013-02-21 16:08:39.071 ERROR [CP WSGIServer Thread-27] [util:256] [userID:] [eventID:] [objectID:] [] EXCEPTION: Traceback (most recent call last):
2013-02-21 16:08:39.071 ERROR [CP WSGIServer Thread-27] [util:256] [userID:] [eventID:] [objectID:] [] EXCEPTION: File "syncengine/lib/syncengine/config/incoming.py", line 273, in addTargetToConnector
2013-02-21 16:08:39.071 ERROR [CP WSGIServer Thread-27] [util:256] [userID:] [eventID:] [objectID:] [] EXCEPTION: File "/usr/lib64/python2.6/re.py", line 151, in sub
2013-02-21 16:08:39.071 ERROR [CP WSGIServer Thread-27] [util:256] [userID:] [eventID:] [objectID:] [] EXCEPTION: return _compile(pattern, 0).sub(repl, string, count)
2013-02-21 16:08:39.071 ERROR [CP WSGIServer Thread-27] [util:256] [userID:] [eventID:] [objectID:] [] EXCEPTION: TypeError: expected string or buffer
2013-02-21 16:08:39.071 ERROR [CP WSGIServer Thread-27] [util:257] [userID:] [eventID:] [objectID:] [] EXCEPTION: ********************