[Samba] net rpc rights grant fail to connect 127.0.0.1

[Douglas G. Oechsler]

Hello!

I am trying to do the command:
*net rpc rights grant "SAMDOM\Unix Admins" SeDiskOperatorPrivilege -U
"SAMDOM\administrator"*
*could not connect to server 127.0.0.1*
*connection failed: NT_STATUS_CONNECTION_REFUSED*

All steps from original samba wiki. The distro is Opensuse 15.1 64 bits, on
Oracle VM, static IP.
I did read several blogs, docs, samba mailing list. Trying many
configurations to solve or connect AD-DC.

*some steps: ad-dc*
in smb.conf:
bind interfaces only = yes
interfaces = lo eth0
 dns forwarder = IP-AD-DC DNS

after command *systemctl status samba-ad-dc*

jul 13 08:58:09 dclinux samba[2146]: [2020/07/13 08:58:09.800684,  0]
../../lib/util/util_runcmd.c:352(samba_runcmd_io_handler)
jul 13 08:58:09 dclinux samba[2146]:   /usr/sbin/samba_dnsupdate: Traceback
(most recent call last):
jul 13 08:58:09 dclinux samba[2146]: [2020/07/13 08:58:09.800882,  0]
../../lib/util/util_runcmd.c:352(samba_runcmd_io_handler)
jul 13 08:58:09 dclinux samba[2146]:   /usr/sbin/samba_dnsupdate:   File
"/usr/sbin/samba_dnsupdate", line 56, in <module>
jul 13 08:58:09 dclinux samba[2146]: [2020/07/13 08:58:09.800934,  0]
../../lib/util/util_runcmd.c:352(samba_runcmd_io_handler)
jul 13 08:58:09 dclinux samba[2146]:   /usr/sbin/samba_dnsupdate:
import dns.resolver
jul 13 08:58:09 dclinux samba[2146]: [2020/07/13 08:58:09.800972,  0]
../../lib/util/util_runcmd.c:352(samba_runcmd_io_handler)
jul 13 08:58:09 dclinux samba[2146]:   /usr/sbin/samba_dnsupdate:
ModuleNotFoundError: No module named 'dns'
jul 13 08:58:09 dclinux samba[2146]: [2020/07/13 08:58:09.818318,  0]
../../source4/dsdb/dns/dns_update.c:331(dnsupdate_nameupdate_done)
jul 13 08:58:09 dclinux samba[2146]:  * dnsupdate_nameupdate_done: Failed
DNS update with exit code 1*

I am lost and do not know what to do.

Please, someone can help me?

Thanks so much

Douglas