[Samba] Restore samba4 backup

[TI]

Hi guys,

My samba4 PDC (we have only one in our LAN) has crashed.

I did a backup yesterday, following the instructions described here https://wiki.samba.org/index.php/Backup_and_Recovery.

Now, I'm trying to restore the backup to a new server. 

I've performed the restore procedures but I'm getting the following errors when I try to start samba4 on the new server:



Calling DNS name update script
Failed to find object (null) for attribute fsmoRoleOwner - Cannot find DN (null) to get attribute fsmoRoleOwner for reference dn: Unsupported critical extension 1.2.840.113556.1.4.529
Failed to find if we are the PDC for this ldb: Searching for fSMORoleOwner in (null) failed: Cannot find DN (null) to get attribute fsmoRoleOwner for reference dn: Unsupported critical extension 1.2.840.113556.1.4.529
Searching for dsServiceName in rootDSE failed: NULL Base DN invalid for a base search
Failed to find our own NTDS Settings DN in the ldb!
Failed to find our own NTDS Settings objectGUID in the ldb!
task_server_terminate: [dreplsrv: Failed to connect to local samdb: WERR_DS_UNAVAILABLE
]
samba_terminate: dreplsrv: Failed to connect to local samdb: WERR_DS_UNAVAILABLE

Calling SPN name update script


Searching for dsServiceName in rootDSE failed: NULL Base DN invalid for a base search
Failed to find our own NTDS Settings DN in the ldb!
Failed to find our own NTDS Settings options in the ldb!



I've attached the error.log file.

What I have to do now ? Could someone help me, please ?

Thanks