domain join error

gistfile1.txt

# samba-tool domain join ad.netdirect.ca DC -Uadministrator --realm=ad.netdirect.ca -W AD
Finding a writeable DC for domain 'ad.netdirect.ca'
Found DC AD1.ad.netdirect.ca
Password for [AD\administrator]:
workgroup is AD
realm is ad.netdirect.ca
checking sAMAccountName
Adding CN=SAMBA1,OU=Domain Controllers,DC=ad,DC=netdirect,DC=ca
Adding CN=SAMBA1,CN=Servers,CN=Lab,CN=Sites,CN=Configuration,DC=ad,DC=netdirect,DC=ca
Adding CN=NTDS Settings,CN=SAMBA1,CN=Servers,CN=Lab,CN=Sites,CN=Configuration,DC=ad,DC=netdirect,DC=ca
Join failed - cleaning up
checking sAMAccountName
Deleted CN=SAMBA1,OU=Domain Controllers,DC=ad,DC=netdirect,DC=ca
Deleted CN=SAMBA1,CN=Servers,CN=Lab,CN=Sites,CN=Configuration,DC=ad,DC=netdirect,DC=ca
ERROR(<type 'exceptions.AttributeError'>): uncaught exception - 'drsuapi.DsBindInfoFallBack' object has no attribute 'supported_extensions'
  File "/usr/lib/python2.7/dist-packages/samba/netcmd/__init__.py", line 175, in _run
    return self.run(*args, **kwargs)
  File "/usr/lib/python2.7/dist-packages/samba/netcmd/domain.py", line 552, in run
    machinepass=machinepass, use_ntvfs=use_ntvfs, dns_backend=dns_backend)
  File "/usr/lib/python2.7/dist-packages/samba/join.py", line 1104, in join_DC
    ctx.do_join()
  File "/usr/lib/python2.7/dist-packages/samba/join.py", line 1007, in do_join
    ctx.join_add_objects()
  File "/usr/lib/python2.7/dist-packages/samba/join.py", line 525, in join_add_objects
    ctx.join_add_ntdsdsa()
  File "/usr/lib/python2.7/dist-packages/samba/join.py", line 458, in join_add_ntdsdsa
    ctx.DsAddEntry([rec])
  File "/usr/lib/python2.7/dist-packages/samba/join.py", line 368, in DsAddEntry
    ctx.drsuapi_connect()
  File "/usr/lib/python2.7/dist-packages/samba/join.py", line 347, in drsuapi_connect
    (ctx.drsuapi_handle, ctx.bind_supported_extensions) = drs_utils.drs_DsBind(ctx.drsuapi)
  File "/usr/lib/python2.7/dist-packages/samba/drs_utils.py", line 144, in drs_DsBind
    return (handle, info.info.supported_extensions)