Impossible to add a windows 10 client

hi i’m new to nethserver,
when i try to add to my primary domain controller, with nethserver, the netbios name is recognized, but after asking me for the administrator’s password, a message appears: error while adding to the domain, other data are available.
the server is not dhcp, nor dns server, these functions are carried out by a pi-hole on the network.
Thanks for your help.

NethServer Version: 7.7.1908

Manually point your Windows 10 DNS to the PDC ip address as the first entry and try again. It has been my experience that you must have a DNS entry on the Windows device to the AD device you are trying to join. You can always have either the Nethserver forward the DNS requests to the pi-hole or have both entries provided.

i tryed, no changes, now the network is the same as PDC, but same error
thanks anyway