synchronize_to_group_v2() Common::InvalidArgument

I unfortunately experience the same problem.

def sync_to_group(self):
    self.api.System.ConfigSync.synchronize_to_group_v2(group=self.name,
                                                       device=self.api._hostname,
                                                       force=False)

Throws this exception when called:

 bigsuds.ServerError: Server raised fault: 'Exception caught in System::urn:iControl:System/ConfigSync::synchronize_to_group_v2()
Common::InvalidArgument
'

If you change "force=False" to "force=True", it will work.