Not able to connect to Active Directory Domain Controller

I did the change to stop DNS checking because I have the SAME issue, and then this happened!
I am really about to give up on Univention.

Internal server error during “adconnector/check_domain”.
Request: adconnector/check_domain

Traceback (most recent call last):
File “/usr/lib/python2.7/dist-packages/univention/management/console/base.py”, line 358, in __error_handling
six.reraise(etype, exc, etraceback)
File “/usr/lib/python2.7/dist-packages/univention/management/console/base.py”, line 261, in execute
function.func(self, request, *args, **kwargs)
File “/usr/lib/python2.7/dist-packages/univention/management/console/modules/decorators.py”, line 181, in _response
return function(self, request)
File “/usr/lib/python2.7/dist-packages/univention/management/console/modules/decorators.py”, line 321, in _response
result = _multi_response(self, request)
File “/usr/lib/python2.7/dist-packages/univention/management/console/modules/decorators.py”, line 181, in _response
return function(self, request)
File “/usr/lib/python2.7/dist-packages/univention/management/console/modules/decorators.py”, line 443, in _response
return list(function(self, iterator, *nones))
File “/usr/lib/python2.7/dist-packages/univention/management/console/modules/decorators.py”, line 289, in _fake_func
yield function(self, *args)
File “/usr/lib/python2.7/dist-packages/univention/management/console/modules/adconnector/init.py”, line 396, in check_domain
admember.check_ad_account(ad_domain_info, username, password)
File “/usr/lib/python2.7/dist-packages/univention/lib/admember.py”, line 274, in check_ad_account
(previous_host_static_ucr_set, previous_host_static_ucr_unset) = prepare_dns_reverse_settings(ad_domain_info, ucr=ucr)
File “/usr/lib/python2.7/dist-packages/univention/lib/admember.py”, line 1076, in prepare_dns_reverse_settings
ip = socket.gethostbyname(ad_server_name)
gaierror: [Errno -3] Temporary failure in name resolution

Were you able to get the specified changes to succeed???

you cant fix it?
I have the same problem.