[Samba] Client Group Policy: talloc_free error

[Roy Eastwood]

Hi,
I am trying to test out the use of Group Policy for winbind clients as added in the latest samba version: 4.14.0    Following the
WiKi at https://wiki.samba.org/index.php/Group_Policy I have set up a client (running Debian Buster and Samba 4.14.0 from Louis'
repo) by adding the required line to the global section of smb.conf (apply group policies = yes).    The domain controllers have
also been updated to 4.14.0 and the samba admx file has been added to sysvol.   I have configured a setting for smb.conf using the
Group Policy Editor from Windows and the client machine has been added to an OU with the policy applied.   I have restarted smbd and
winbind on the client.   When I enter samba-gpupdate I get the following error:

root at moggy:~# samba-gpupdate
ERROR: talloc_free with references at ../../libgpo/pygpo.c:481
        reference at ../../pytalloc_util.c:164
        reference at ../../pytalloc_util.c:164
        reference at ../../pytalloc_util.c:164
Failed downloading gpt cache from 'pi-dc.microlynx.org' using SMB

If I provide the Administrator user and password the error changes to:
root at moggy:~# samba-gpupdate -Uadministrator
Password for [MICROLYNX\administrator]:
ERROR: talloc_free with references at ../../libgpo/pygpo.c:481
        reference at ../../pytalloc_util.c:164
        reference at ../../pytalloc_util.c:164
ltdb: tdb(/var/lib/samba/private/sam.ldb): tdb_open_ex: could not open file /var/lib/samba/private/sam.ldb: No such file or
directory

Unable to open tdb '/var/lib/samba/private/sam.ldb': No such file or directory
Failed to connect to 'tdb:///var/lib/samba/private/sam.ldb' with backend 'tdb': Unable to open tdb '/var/lib/samba/private/sam.ldb':
No such file or directory
Failed to apply extension  <class 'samba.gp_sec_ext.gp_access_ext'>
Message was: Failed to load SamDB for assigning Group Policy

A reboot of the client did not improve matters.     I tried adding the line: 'allow group policies = yes' to the domain controllers'
smb.conf but that did not make any difference either.      I am obviously missing something, any advice will be appreciated.

Roy