[Samba] samba ad errors in log

[Sonic]

I'm seeing a lot of these errors from a Samba 4.13.0 DC running on
Debian Buster, the smb.conf is untouched from that which was created
via a classic upgrade.
===============================
Oct 24 10:25:43 srvr01 samba[26688]: [2020/10/24 10:25:43.886363,  0]
../../lib/util/util_runcmd.c:352(samba_runcmd_io_handler)
Oct 24 10:25:43 srvr01 samba[26688]:   /usr/local/samba/sbin/samba_dnsupdate:
dns_tkey_gssnegotiate: TKEY is unacceptable
Oct 24 10:25:43 srvr01 samba[26688]: [2020/10/24 10:25:43.970786,  0]
../../lib/util/util_runcmd.c:352(samba_runcmd_io_handler)
Oct 24 10:25:43 srvr01 samba[26688]:   /usr/local/samba/sbin/samba_dnsupdate:
dns_tkey_gssnegotiate: TKEY is unacceptable
Oct 24 10:25:43 srvr01 samba[26688]: [2020/10/24 10:25:43.996118,  0]
../../source4/dsdb/dns/dns_update.c:86(dnsupdate_nameupdate_done)
Oct 24 10:25:43 srvr01 samba[26688]:   dnsupdate_nameupdate_done: Failed DNS
update with exit code 2
Oct 24 10:32:15 srvr01 smbd[18336]: [2020/10/24 10:32:15.313981,  0]
../../source3/smbd/service.c:169(chdir_current_service)
Oct 24 10:32:15 srvr01 smbd[18336]:   chdir_current_service:
vfs_ChDir(/usr/local/samba/var/locks/sysvol) failed: Permission denied. Current
token: uid=5035,
Oct 24 10:32:15 srvr01 smbd[18336]: [2020/10/24 10:32:15.343201,  0]
../../source3/smbd/service.c:169(chdir_current_service)
Oct 24 10:32:15 srvr01 smbd[18336]:   chdir_current_service:
vfs_ChDir(/usr/local/samba/var/locks/sysvol) failed: Permission denied. Current
token: uid=5035,
Oct 24 10:32:15 srvr01 smbd[18336]: [2020/10/24 10:32:15.343972,  0]
../../source3/smbd/service.c:169(chdir_current_service)
Oct 24 10:32:15 srvr01 smbd[18336]:   chdir_current_service:
vfs_ChDir(/usr/local/samba/var/locks/sysvol) failed: Permission denied. Current
token: uid=5035,
Oct 24 10:32:15 srvr01 smbd[18336]: [2020/10/24 10:32:15.344623,  0]
../../source3/smbd/service.c:169(chdir_current_service)
Oct 24 10:32:15 srvr01 smbd[18336]:   chdir_current_service:
vfs_ChDir(/usr/local/samba/var/locks/sysvol) failed: Permission denied. Current
token: uid=5035,
Oct 24 10:32:15 srvr01 smbd[18336]: [2020/10/24 10:32:15.345268,  0]
../../source3/smbd/service.c:169(chdir_current_service)
Oct 24 10:32:15 srvr01 smbd[18336]:   chdir_current_service:
vfs_ChDir(/usr/local/samba/var/locks/sysvol) failed: Permission denied. Current
token: uid=5035,
Oct 24 10:32:15 srvr01 smbd[18336]: [2020/10/24 10:32:15.345987,  0]
../../source3/smbd/service.c:169(chdir_current_service)
Oct 24 10:32:15 srvr01 smbd[18336]:   chdir_current_service:
vfs_ChDir(/usr/local/samba/var/locks/sysvol) failed: Permission denied. Current
token: uid=5035,
Oct 24 10:32:15 srvr01 smbd[18336]: [2020/10/24 10:32:15.347542,  0]
../../source3/smbd/service.c:169(chdir_current_service)
Oct 24 10:32:15 srvr01 smbd[18336]:   chdir_current_service:
vfs_ChDir(/usr/local/samba/var/locks/sysvol) failed: Permission denied. Current
token: uid=5035,
Oct 24 10:32:15 srvr01 smbd[18336]: [2020/10/24 10:32:15.348141,  0]
../../source3/smbd/service.c:169(chdir_current_service)
Oct 24 10:32:15 srvr01 smbd[18336]:   chdir_current_service:
vfs_ChDir(/usr/local/samba/var/locks/sysvol) failed: Permission denied. Current
token: uid=5035,
Oct 24 10:32:15 srvr01 smbd[18336]: [2020/10/24 10:32:15.348730,  0]
../../source3/smbd/service.c:169(chdir_current_service)
Oct 24 10:32:15 srvr01 smbd[18336]:   chdir_current_service:
vfs_ChDir(/usr/local/samba/var/locks/sysvol) failed: Permission denied. Current
token: uid=5035,
Oct 24 10:32:15 srvr01 smbd[18336]: [2020/10/24 10:32:15.349318,  0]
../../source3/smbd/service.c:169(chdir_current_service)
Oct 24 10:32:15 srvr01 smbd[18336]:   chdir_current_service:
vfs_ChDir(/usr/local/samba/var/locks/sysvol) failed: Permission denied. Current
token: uid=5035,
Oct 24 10:32:15 srvr01 smbd[18336]: [2020/10/24 10:32:15.350016,  0]
../../source3/smbd/service.c:169(chdir_current_service)
Oct 24 10:32:15 srvr01 smbd[18336]:   chdir_current_service:
vfs_ChDir(/usr/local/samba/var/locks/sysvol) failed: Permission denied. Current
token: uid=5035,
Oct 24 10:32:30 srvr01 smbd[18336]: [2020/10/24 10:32:30.390516,  0]
../../source3/smbd/service.c:169(chdir_current_service)
Oct 24 10:32:30 srvr01 smbd[18336]:   chdir_current_service:
vfs_ChDir(/usr/local/samba/var/locks/sysvol) failed: Permission denied. Current
token: uid=5035,
Oct 24 10:32:50 srvr01 named[24228]: samba_dlz: starting transaction on zone
example.com
Oct 24 10:32:50 srvr01 named[24228]: client @0x7fd0fc01a040
192.168.7.176#64721: update 'example.com/IN' denied
Oct 24 10:32:50 srvr01 named[24228]: samba_dlz: cancelling transaction on zone
example.com
Oct 24 10:32:50 srvr01 named[24228]: samba_dlz: starting transaction on zone
example.com
Oct 24 10:32:50 srvr01 named[24228]: client @0x7fd0fc01a040
192.168.7.176#63427: update 'example.com/IN' denied
Oct 24 10:32:50 srvr01 named[24228]: samba_dlz: cancelling transaction on zone
example.com
===============================
Any clues as to why?

Thanks,
Chris