[Samba] NT_STATUS_FS_DRIVER_REQUIRED

[banda bassotti]

Hi, I have installed a new dc:

- debian buster
- samba 4.13.2 from apt.van-belle.nl

with the following configuration:

[global]
  dns forwarder = 192.168.1.3
  netbios name = MARTE
  realm = DOM.LAN
  server role = active directory domain controller
  workgroup = DOM
  interfaces = 192.168.1.2,127.0.0.1
  bind interfaces only = Yes

  log level = 4
  max log size = 50000

  guest account = nobody
  map to guest = Bad User

  usershare path =

[sysvol]
  path = /var/lib/samba/sysvol
  read only = No

[netlogon]
  path = /var/lib/samba/sysvol/defilippo.lan/scripts
  read only = No

[video]
  path = /home/video
  vfs objects = acl_xattr

from command line access is ok:

smbclient //dom.lan/video -Utestuser -c 'ls'
Enter DOM\testuser's password:
  .                                   D        0  Mon Nov 23 05:32:17 2020
  ..                                  D        0  Sun Nov 22 11:44:50 2020
  test1.mkv      N 2976050178  Sun Nov 22 20:19:49 2020
  test2.mkv      N 3948612773  Sun Nov 22 12:43:40 2020
  test3.mkv      N 3409174562  Sun Nov 22 12:56:26 2020

                475682792 blocks of size 1024. 439209584 blocks available

also using net use:

net use z: \\dom.lan\video /user:dom\testuser

Z:\>dir
 Il volume nell'unità Z è torrent
 Numero di serie del volume: FB67-5BD5

 Directory di Z:\

23/11/2020  05:32    <DIR>          .
22/11/2020  11:44    <DIR>          ..
...

trying from explorer client  (\\dom.lan\) I can see:

netlogon, sysvol and video directory but can't access, below the logs

[2020/11/23 05:37:10.569469,  4]
../../auth/auth_log.c:753(log_successful_authz_event_human_readable)
  Successful AuthZ: [DCE/RPC,ncacn_np] user [DOM]\[testuser] ...
...
[2020/11/23 05:37:15.056122,  3]
../../source3/smbd/smb2_server.c:3863(smbd_smb2_request_error_ex)
  smbd_smb2_request_error_ex: smbd_smb2_request_error_ex: idx[1]
status[NT_STATUS_FS_DRIVER_REQUIRED] || at ../../source3/smbd/sm
b2_ioctl.c:313

What does it mean  NT_STATUS_FS_DRIVER_REQUIRED ?