Unknown parameter encountered: "guest ok"
Ignoring unknown parameter "guest ok"
module samba_dsdb initialization failed : No such object
Unable to load modules for /var/lib/samba/private/sam.ldb: dsdb_module_search_dn: did not find base dn @ROOTDSE (0 results)
Traceback (most recent call last):
  File "/usr/share/samba/setup/upgradeprovision", line 1716, in <module>
    ldbs = get_ldbs(paths, creds, session, lp)
  File "/usr/lib/pymodules/python2.7/samba/upgradehelpers.py", line 156, in get_ldbs
    ldbs.sam = SamDB(paths.samdb, session_info=session, credentials=creds, lp=lp, options=["modules:samba_dsdb"])
  File "/usr/lib/pymodules/python2.7/samba/samdb.py", line 55, in __init__
    options=options)
  File "/usr/lib/pymodules/python2.7/samba/__init__.py", line 114, in __init__
    self.connect(url, flags, options)
  File "/usr/lib/pymodules/python2.7/samba/samdb.py", line 69, in connect
    options=options)
_ldb.LdbError: (80, 'dsdb_module_search_dn: did not find base dn @ROOTDSE (0 results)')
dpkg: error processing samba4 (--configure):
 subprocess installed post-installation script returned error exit status 1
Errors were encountered while processing:
 samba4
E: Sub-process /usr/bin/dpkg returned an error code (1)